Irregular

Hey there fellow vagina owners. First time posting here. So I started my period when I was 14 (I'm 20 now) and it has never been "regular". Only reason I'm not caught by surprise is because a couple days before I start, I get really awful cramping and it lasts until the last 2 days of my period. Cramps are so awful I've ended up in the hospital and I've passed out. Always super heavy flow, and I get big clots too. I can go two or three months between periods or sometimes its two or three weeks! My periods are never less than 7 days ling and have been as long as 15 days before. I've never been on BC (hello queerness!) and I don't really want to go on BC. Anyone else relate?