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That is the Sp02 sensor, a pulse oximeter, they were suggesting you should get and check your levels every hour of the day. It tracks your blood saturation of oxygen. Very important. Delta is one of the new variants rapidly spreading in the U.S. right now, most likely the variant of the Sars COV-2 strain you have. It also wouldn't hurt to check other vitals like your blood pressure daily. In the beginning stages of covid in my household I had created a log to see what our each individual baselines were so when things changed dramatically we knew when to go to the ER right away, it was very helpful.
Look at your nail beds and your lips when you are doing this. If they ever look blue, go to the hospital. What you are describing could be an exercise thing (if you were practically bedridden) or you could be experiencing cardiovascular issues. Maybe get a pulse ox device to make sure your blood is oxygenating correctly.
FaceLake ® FL400 Pulse Oximeter Fingertip with Carrying Case, Batteries, Lanyard, and Warranty (Blue)
Well you know there is a way to check it... Take your pulse :). It's pretty easy to do also you could buy a sp02 monitor and use the pulse reading off of there to double check.
It sounds like you have all your basis covered.
The pulse oximeters are $30 on Amazon. About 1 in 10 has bad readings, so check it against yourself and your wife (healthy nonsmoker should be 98-100). I got one and it read 94, I was 99 at my Doc;s so it went back. The next one matched my docs. My wife is a smoker and always reading 90-92 (not good).
Random one (came up at $19.90)
Doctor checking in (MD, PhD - disclaimer: working in neuroscience research currently, not clinics). While I can’t give you any direct medical advice or diagnoses, I wanted to share my thoughts here in case you find them helpful.
I am so sorry that you are going through this. It would be good to assume that you have covid. There is no way that you have all these symptoms, and it’s some other unknown respiratory illness. It is making me nuts to see doctors going down the ‘anxiety’ diagnosis, which is commonly incorrectly diagnosed for any unusual illness or when doctors are confused or overwhelmed (or - to be angrily blunt - just being lazy). While anxiety is clearly involved in our current pandemic and can be a very real and difficult diagnosis, patients with symptoms like yours should not be diagnosed with that over the potentially fatal covid! And anxiety does not cause fevers (at least not in any normal conditions).
Here is some info that might help you argue for another test in the future, as I suspect you’ll need to be tested again. There are a large variety of covid detection tests, each of which has different levels of accuracy. The tests being used in the US right now for active covid infections are generally good at correctly identifying that you have covid, but are NOT good at identifying that you don’t. The tests have high specificity but low sensitivity- the two key ways to evaluate any medical test like this. That means that when you test positive, you can be pretty sure you have the disease (true positives), but when you test negative, you may still have the disease (false negative). EVERY doctor should know and understand this; I am shocked by how badly this is being mangled by health care worked during this pandemic. Due to the crisis, we rushed tests into use that haven’t been fully vetted or properly developed. This approach is fine, AS LONG AS doctors remember that tests are fallible and use their clinical examination skills to actually evaluate the patient. You cannot simply dismiss symptoms like yours because a somewhat-faulty nasal swab (or even multiple swabs) is negative.
Also, in many cases the nasal swab must reach the top of your sinus cavity to be the best at actually grabbing some virus. It sounds like you’ve been given half-assed swabs (at least the first time): for most people, the swabs should be uncomfortable at the least, and several seconds of swabbing are required. Doing the test incorrectly adds to the chances of a false negative result.
Your goal now should be to take a good care of yourself and your family. Do NOT be afraid to return to urgent care or the ER to insist on being seen. Being ‘too young’ is another cop out for many diseases, and is commonly an issue with diagnosis of chronic illnesses in the younger population in general. The age-demographics for a disease simply mean in this case for covid that moderate-severe symptoms are more common in older people (~> 60yo). They do NOT mean that younger people can’t get it. In fact, the average age of hospitalizations in the country NOW are in the 20-40 range (varies some by hotspots).
Unfortunately, doctors in many areas are overwhelmed, and everything has been politicized. Due to these things, you need to be your own healthcare advocate. If symptoms continue or get worse, insist you get seen. Your breathing troubles/heart rate changes are concerning (see article about these issues of ‘silent hypoxia’ with covid here. Try to find a pulse oximeter (Amazon example option ) to check your blood oxygen levels. Your measurement of SpO2% should be above 94 (see article for explanation here). If you are below 94, there’s a very strong chance you need to be in the hospital on supplemental oxygen.
Your increased heart rate is most likely due to low blood oxygen levels. Your heart rate increases to try to get enough oxygen to your tissues when your inhaled O2 is too low. You likely need a chest X-ray to evaluate how infected your lungs are. Overall, be very careful with yourself. Even if you hopefully manage to avoid hospitalization, you will likely need a while (weeks) to fully recover, and this disease has been showing that it can cause rebounds of symptoms every time a patient exerts him/herself during recovery.
Again, I am so sorry you are going through this. Please, please take care of yourself. Feel free to send me any questions about this.
tl;dr: there’s a good chance you have covid and should act accordingly.
See a doctor and ask what kind of situation you need to be sent to a hospital immediately.
Monitor your blood oxygen level closely.
If that reading consistently dips under 90%, it's time to go to the emergency room.
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FaceLake ® FL400 Pulse Oximeter Fingertip with Carrying Case, Batteries, Lanyard, and Warranty (Blue) https://www.amazon.com/dp/B0117V8Q2O/ref=cm_sw_r_cp_api_glt_fabc_1HFZMG34P6CF78X72JJY?_encoding=UTF8&psc=1