Sharp pains on my right side just below my belly button. i've had my appendix taken out already this is lasted 4 days and have had diarrhea?

Colitis: This clinical scenario suggests some inflammation of the lining of the colon, although it is also possible that a process exterior to the gut is irritating the gut secondarily. The best way in which to evaluate this is to see your family doctor, provide a full history and submit to an exam and possibly some labs and imaging studies. Good luck and hope this clears up soon.