I hate periods

I hate periods with a passion. And I don't mean in a bratty "they're such an inconvienience" I mean I'm suck doubled over, on high pain killers for a week because they cause crippling pain. It feels as if I have been wearing a pair of jeans 10 sizes too small for 5 years straight.
I've been to my doctors are I'll be honest; they were no help. I've visited private clinics and they've taken bloods, along with other samples and nothing. Absolutely nothing.
I was wondering if any of you ladies suffer from similar problems. Any advice?