About three days ago, I started having these stomach pains shortly after lunch. They weren't constant, more like every so often my stomach would hurt, almost like a cramp. This has continued through yesterday. I haven't had the pains yet today (it's almost 9:00am). However, I haven't had much of an appetite since the pains started and i've been slightly nauseous at times. Also, on the first day, my stool was slightly softer/mushier than usual, but today it is definitely watery diarrhea, no diarrhea pain though, just urges to go. I have been in taiwan for the past two weeks, but I come here once every one or two years as my relatives live here. I am 19 years old. Any idea what's wrong?