I looking to see what I have, I have burning sensation in my upper stomach. Had diarrhea a few times a day for 2 weeks, slight headche on and off, little bloated in my stomach too, I had stool samples done and no bacteria so the doctor put me on metronidazle. the doctor is on vacation now and i have been on the meds days and i still have achy stomach. He said it can be colitas, does that sound possible. I am with a new doctor in a new state