Nancy
You might ask your Dr. to send you to a send you to someone to do a colonoscopy. I just had one and they found a disease called Diverticulites.You have some of the same symptoms I had.Or it could be irriable bowel syndrome.Try eating more fiber in tour diet and taking metamusil.There is also a scope test that can be done in the Dr.office.you could have your Dr. do this one first.Let me know how this turns out.