I thought the running was causing the cramps, but the past 2 days I've been having the cramps really bad throughout the day and I'm not doing anything but sitting at my computer or walking or something. Just now, the cramps got so bad that I became nauseous and went to the bathroom to throw up. The feeling passed after 5 minutes. The cramp is right in the pit of my stomach and it hurts pretty darn bad. You know when something is about to make you throw up that it hurts...