I've had stomach problems for a while. I think part of it is due to all the pills I take and part of it is due to the fact that I have gallstones and have had endometriosis. I rescheduled my appt with my endocrinologist (sp) for Jan 22nd to confirm. Maybe it's the meds you're taking or an ulcer. I would see a endo dr to see if they can find out. I hope you find out what it is and feel better soon.