I have pcos, and had AWFUL periods. I wouldn't go to school for that week. I would cry from the cramps no matter what medication I took. I eventually got high dose Ibuprofen, which would dull the pain for a few hours, but it's so unhealthy to take that all of the time. My body began to associate Ibuprofen with periods. I swear. I would take one for a headache, during a time when I was not at all supposed to get my period, and suddenly I'd have it! Very weird.
Eventually I started taking BC (it took a few trials to find one that worked for me) and I took it every day to prevent getting any periods. So awesome!!! I did that for years with no side affects, and no periods at all. My doctor told me to stop taking it for a couple weeks a year to have one period just to make sure everything was normal. I got pregnant WHILE taking birth control constantly, and despite being told I would never be able to get pregnant, so I don't think it hurt my chances at all.
Our bodies are NOT designed to endure constant periods through out our lives. Especially not horrific, painful periods! We're designed to have baby after baby, to breast feed for years and not get our periods, then to get pregnant again and repeat the process. You should definitely do something to ease your pain and discomfort, there are so many options out there that don't have impact on your long term fertility.