This app was mentioned in 3 comments, with an average of 1.00 upvote
Here's the android version - https://play.google.com/store/apps/details?id=com.lcs.mmp.lite&hl=en_US&gl=US
I've not used it, but 4.6/5.0 with 2,782 reviews. Pro version is $3.99
I've used Manage my pain for in depth analysis, but I found the mood app Daylio to be very easy to use. I just replaced the moods on Dailyo with degrees of pain and used it for almost a year. It's basically effortless to use and gives a nice overview.
Personally I don't do that anymore tho, as I found myself basically focusing on the pain and it just made it worse for me. Using these apps, I found my pain to have no consistent pattern or logical correlation to any specific activity or circumstance. I've accepted that I have pain for no reason and try to live with that day by day. I know that might not be the answer you hope for, and I do hope you will find better use of the data from these apps then I did :)
Good luck!
It's totally possible that they may be dismissive of your symptoms. I usually recommend people use a symptom diary and bring it with them to the doctor to help illustrate how often and in what severity their symptoms occur. It's harder for doctors to dismiss data. :)
I also really encourage you to write down all the questions you may have as you think of them - and bringing a friend with you. It can help to have them there to remind you of what was said, and to make sure you get answers.
In case they are dismissive of surgery to diagnose endo - at least have them run some tests to rule things out. Blood tests to test for PCOS, an internal ultrasound to look for cysts or fibroids, Urinalysis to look for IC. If all those come back clean - you're in a much better position to assume endo.
Sometimes doctors need to know you want a solution, an answer and treatment rather than a pain pill. A lot of us struggle with doctors thinking we are drug seeking - when what we really want is treatment!
And should the doctor telly you that you are making it up, or that it "can't" be endo for whatever reason, or having a baby will fix it, or only hysterectomies will fix it....just say very matter of fact - "I appreciate your skills, but given that this could be a chronic condition, I would like to have a second opinion from a specialist. Do you know of someone you would recommend? If not, could you please set up the process for me to find my own second opinion?"
You can do it, and we're all here to help. Check out the sidebar for some of the specialists recommended by the this group, and endo advocacy networks.