about a year ago I began to get serious stomach cramps. My stomach usually starts hurting around dinner time and gradually increases as the night progresses. The pain gets so bad around 9-11 that it causes me to throw up every 15 minutes through the night until about 7am. Then it starts to go away slowly throughout the next day. It almost always happens at night, and has only happened once during the day. This happens every month almost. I went to the doctor and they discovered I had an ulcer in one of my ovaries. Not sure if this would cause the pain. What could this be ?!!