Well...I was recently diagnosed with IBS. However when I was younger...I had D all the time and never constipation. It was at the point where I was afraid to leave the house because I might have to go to the bathroom. I was diagnosed with stomach and esopageal ulcers but never anything else. I kind of assumed I had colitis.
I had the glucose tolerance test in college and was then diagnosed with low blood sugar.
Thanks for all the advice. I will look into that book and the condition that Kat721 mentioned. Thanks!