Hi ask your doc or find a doc that will give you a Sitz Marker test...that will tell you if your colon and sm intestines are doing what they should. I had all that done that you did and they told me the exact same thing.. So went out on my own and had the test run and sure enough, my colon was not working and so full it was ready to rupture. So they did a total colectomy, read the one that says total colectomy changed my life...I feel great and it will be 2 months tomorrow....life is back and it is good.. So good luck to you and being on her you will find to be of great comfort and help..they helpd me so much and I am so thankful for all their suggestion and love and support...