Super Intense Cramps

Does anyone out there experience cramping so bad that you need to take prescription painkillers and the cramping is bad enough to the point of crying and vomiting because the muscle contractions are out of control? Mine were never bad but in the past year and a half they have gotten worse. I was on a monthly birth control and I've seen my doctor and now I'm on seasonique (period 4x a year). Since I've been on it I've skipped over 1 period and currently should have had it this past week if I wasn't on it but I've been spotting for 16 days straight now. And I'm not supposed to get my period for another month. Does anyone have any suggestions about what this could be besides just normal cramping that all women deal with.