hmm.. I had something similar to that. My doctor said it was gastritis, which is like little scratches in the lining of your stomach. It is caused from stress, even though I didn't feel particularly stressed at the time. It would wake me up in the night with like sharp stabbing pains.. anyway, he told me to take 2 Zantac 3 times a day, and it went away in about 2 weeks. Maybe see your doctor though, just in case

Hope you feel better