*first post so please try to bare with me in terms of format*
Some Medical History
So for context I(19) was diagnosed with hypothyroidism and Hashimoto's disease at 13-15years old. I'm terrible with taking medication on a schedule, but especially so at that age. I would go 4 days-a couple weeks without taking it (levothyroxine 1/2 of 125mc/day). Thankfully I have more of a routine so it's not much of an issue now, and the only symptoms i notice are hair loss and weight fluctuation; My cycle is usually like clockwork and I track it regularly. I assume I started ovulating 16 days ago, I was sore/cramping in my lower stomach/pelvis area. I've never really had pms symptoms like cramping or anything other than some mood/mental changes, and I've never noticed ovulation pains either.
What's Been Going On
About a week and a half ago I stated feel overall off (migraines, fatigue, bloat, irritability, nausea). I was supposed to start my period the next day, but I was suspicious because of how unusual it was for me, so I took a test and it was negative. I proceeded to not have my period for 3 days after; I took another test after the first missed day, which also came up negative. Not even a faint line. On day 4 I started bleeding. Oddly enough it was pink, brown, and accompanied by a string thin line of what looked like dark brown clot. I'd like to add I'm a heavy bleeder. I'm talking filling 1 S tampon in 2-4hrs the first day and 2-3 the second. What came wasn't even enough to fill a pad for that whole day. The next day was heavier, still not quite like my usual. It had more reddish brown than pink, still on the thinner side. Day 3 it mostly stopped. it's now mid day 4 and I felt it once (kinda like reddish discharge) and nothing since.
If anyone is knowledgeable with situations like this I'd greatly appreciate any advice I can get