I have been experiencing a lot of stomach issues accompanied with general indisposition; headaches, weakness and vomiting. Also right after I finish eating I need to go to the bathroom, and whenever I go I have diarrhea. Immediately after eating my stomach swells up and the pain is there. I feel all sick in general. The pain is very sharp when applying pressure to the left and just below my belly button. It's been going on for a little over two weeks. Pepto bismo hasn't helped, or any other stomach pain relievers. Please, can you tell me what it could be.