Do you ever try taking antacids or something instead of eating? I wake with a weird feeling sometimes in the middle of the night that I equate to hunger "or something", more an ache than a pain though, and I take a Pepcid Complete and that fixes it; sometimes if I eat instead (unless it is dry toast) it does develop into real acid burning sort of pain (and I'm sorry I ate). If an antacid might fix it (and keep you from throwing up) that would give you a clue. I do the Pepcid Complete because they're half like Tums (the calcium and all that good stuff for the stomach itself) and half bloodstream stuff that takes 15-20 minutes to work, they last 12 hours but I don't think I've ever needed more than 1 in a 24 hour period.