You better go to the doctor. Eventually, your body gets dehydration and your internal organs get affected. Obviously, it's not normal or healthy. Also, many HIV positive people experience this chronically as a symptom, which again, is a reason to go see your doctor. If it's been more than a day or two, which you do not state, that is your best bet, if no over the counter drugs like Pepto-Bismol have helped.
Could be a virus, IBS or Crohns. Go see a doctor so you can find out exactly what's going on. I listed possible reasons for diarrhea but no one can diagnose you except a doctor. Go to the doctor right away. Drink fluids so you don't get dehydrated.
So many reasons: food allergies, medication side affects, etc. How long has this been going on? Have you had a shot or had the flu lately? Whatever the reason, get it checked by your doc. Have you tried any store remedies?
There could be many reasons. I have the same problem. They removed my gallbladder and it didn't help. I am still going through testing. You should not ignore this go see a doctor asap. We can only make suggestions here. You really need to see a doctor!