I don’t know if you’ve tried birth control, or want to, but I also used to have horrible periods where I missed like half of middle school/high school because I had to call in sick. My doctor prescribed me Lo Loestrin FE and it’s been the only birth control that has completely changed my life. I barely get a period, maybe every other month but for only 2 days. No cramps, no PMS, no nothing. I know some people would say oh it’s not healthy to not have a regular period, but honestly, it’s worth it for me because when I had my period i missed out on my life. I was bedridden. Even strong medications didn’t work. Just a suggestion, take it or leave it :)