Hmm have you talked to your doctor about what you can do? Some medical problems can cause extremely painful menstrual cramps
. I think you should make an appointment with your doctor to see if anything can be done to help you with this problem. Good Luck, I am sorry you are having to deal with this!
PS. I honestly don't see how you women do it! I can imagine having to go through menstrual cramps or child birth. I have much respect for you! Yea for women!! lol