Horrible cramps

Ever since i got pregnant i have had horrible cramps. I mentioned it to my doc at the 8 week appt and she said its probably just my csection scar stretching. Back then that could have been plausable but now they hurt far above the scar. They can be so severe that i cant talk when they happen and i double over. It happens daily. It feels like im being stabbed. I dont like it at all. This is my 4th sucessful pregnancy and ive had 3 csections, this has NEVER happened before. I dont know what to do anymore. I see my doc again next week for the 20 week appt and i hope the US can shed some light on why im cramping so much. Anyone else going through severe cramps their entire pregnancy so far??