I Have Had Diarrhea For 6 Months. I Feel Fine.

I have had diarrhea for 6 months. I feel fine. Just before the diarrhea I have small cramps. I was prescribed anti-biotic a so for 3 weeks, for what the doctor thought was a chest infection back in May. I go at least 5-6 times a day???? Thanking you in advance.