Off Birth Control, awful awful PMS cramps

I just recently got off of my birth control ( I'm not trying to get pregnant), and I start my period next week. I was on it for 3 years and I remember before bc my periods were terrible, like pms 2 weeks before. Since it's only 1 week, that's not bad, but these cramps kill me. I'm a much healthier person now, so maybe my workout tomorrow will help, but any advice on this transition? Thanks!