Menstrual Cramps all month long...?

I have horrible cramps also during my period, to the point of ping out and throwing up. I usually start having slight cramps about a week, maybe a little longer before my period. I've noticed its usually around my "fertile" time of the month. I think it could just be your body getting ready for the upcoming period. Mine usually goes away on their own if i just relax and maybe try to take a nap, sometimes i take 2 ibprofen and that always clears it up.