Wow, you poor things! I've had period pain, but I'd never have considered it so bad that I would have to take painkillers for it. For some reason, it used to be worse for the first few years, maybe up to age 12 or 13, and now I don't really get any, although it does vary quite a bit from month to month.
My mother says, 'You won't get fat on the pill if you don't eat like a pig', but then she does love being insensitive, and I think it would vary from person to person. Has never done anything to me. Better being fat than pregnant, anyway!