Dealing with Menstrual Irregularity: Seeking Opinions and Ideas

Hi everybody! hopefully someone will see this that understands because I've been trying to figure out what was wrong with me for ages. im a plus-sized human. 350ish pounds give or take. no kids. never been pregnant. I got my period at 12-13 and was like clockwork until I was about 16. I started missing periods. no pain. no bleeding/spotting. drs like to chalk it up to my weight even though I have been roughly the same weight most of my life. they put me on a birth control pill and I bled heavy for 6 months so they told me to stop the pill. I stopped digging into it for a few years cause I was kinda glad not to have to deal with it tbh. 2021 rolls around. I'm 31. stable relationship and thinking about kids. drs put me on depo pill. worst 3 weeks of my life!!! heavy bleeding. painful cramps. passed out twice and went to urgent care. got put on a fast-acting "magic pill" to stop my period within days. ultrasound was clear. drs are saying its Endo but I'm still just not sure. thoughts? opinions? ideas?