I have a colonoscopy appt. soon but trying to figure out what is going on. I m 66, female, T1 diabetic for 44 years with no majot complications. Since May I ve been feeling very nauseated, swimmy headed, a little loss of balance. I thought I had Vertigo but have been told that I don t. Also since August I ve started having constipation, change in my bowel habits and stools. So very nauseated at times I have to just get still for a long while. Any ideas? I ve been to Neurologist, MRI w contrast was all good. I ve been to ENT, GP, Neuro Opthamologist....then decided to go to Gastrointerologist. HELP! I knew there had to be a catch to this....Shame on you!!!!