I had similar symptoms going back 3 years ago, when I first moved to Spain. I had a stomach bug, but got over it. Then for months afterwards, I'd get abdominal discomfort a couple of hours after eating. At that time, I could not speak much of the lingo and so was reluctant to see a Spanish doctor. In the end, I tried taking some probiotic drinks I bought in Carrefour (Aloe Vera ones I think) and within a week I was cured.
If you've had an upset tummy or diahorrea lately, you're intenstinal flora could be out of sync, and your good bacteria might be in need of reinforcing.