Period Hell

Leigh
So I've had my period for 8 years now, and every month is the same thing. 
I get horrific cramps, get nauseous, throw up, get dizzy, pass out, and get pain shooing up my back and down my legs. 
Does anybody else get this or know why it happens?
I was on birth control for 3 years but it started messing with my hormones really badly and made me really emotional so I stopped taking it. 
I was also raped when I was 7 years old and I'm not sure if I have any physical damage from that. I'm afraid I do and that I can't have kids because there have been some times that I definitely could have gotten pregnant and didn't. 
I'm not asking for sympathy, just advice. Thanks!