Do you think intestinal parasites?

You need a colonoscopy to find out what is really wrong. They will give you something to numb the pain, and really with what you have gone through, a colonoscopy will be a piece of cake. And you will find out exactly what is wrong and get treated and will feel so much better. I have had colonoscopys and while it is not comfortable to have, it is really not as bad as you apparently think it is. You need answers, the Doctor needs answers to treat you. Do as the doctor suggests and get one. You will be glad you did, just the worry alone you have had is enough to make you sick.