Suggest Treatment For Sharp Left Sided Abdominal Pain And Vomiting

I have been having sharp pains in my left side of stomach about midway of it. I have not had a solid bowel movement in 3 months. It often makes me sick feeling to the point of vomiting. I was checked out with the same pain about 7 years ago and spent 23 hours in the hospital, with their diagnosis being that I had co reacted an u known vs Ted is in my stomach from the meat processing plant that I once worked. It would always flare up when I ate pork. However, I have not been eati g pork now, and I do not feel any other symtoms of an ulcer. Any ideas?