This app was mentioned in 4 comments, with an average of 2.00 upvotes
I've found My Pain Diary to be really helpful, it's has a weather bit too but not a medication reminder.
It takes a while to get used to it and it is intentionally very basic, however once you fill it in with specific symptoms/triggers/locations/remedies etc. for you it is very easy. It can also create a pdf that you can print for your doctor to show them very easily how the pain has been over the time period you set.
They mostly do the same job though, really.
Good advice, thanks. The Android version, and the old iOS version have a slightly different name than the new app discussed here.
If you were to search for 'my pain diary' without the rest, that should have worked.
You can request tests to rule out other options, which doctors usually like to do first anyway.
I also encourage you to keep a pain log. Believe it or not, it helps doctors see the trends in your experiences. There are smart phone apps that help, and chart things for your doctor.
Jumping into a lap - while it can confirm endo - may be something you want to try after you rule out similar diseases and have some data from your journal to support you.
The waiting to check on the other things can suck, but it really does help.
If you're on iOS: My Pain Diary includes weather info.
edit: Android too. They're $5, though.