For the past week or so I've been having some stomach pain. It comes and goes. It usually subsides or weakens when I am eating ... but will come back shortly after. It's at it's worse during the night, before I go to bed. It keeps me up. I know it's my actual stomach (not my 'belly'). It's on the right side of my stomach and travels upwards a bit... I get a little nauseous as well. It's not effected by TYPES of food and I've tried pepto bismol and Zyntec(whatever it's called), which has no effect. Is it an ulcer, just heartburn? What is it?