My gosh, you ARE just like me gymrat.
I also have NO pain or bloating. I just have diarrhea / loose stools on a daily basis for 2 1/2 months now. Doesn't this jsut drive you CRAZY?! You read about IBS and it says that there is pain, cramping, and bloating. I have none of those symptoms, just the sudden URGE to go. And after I go, I feel better. Are you like this too??? I have also lost some weight...I'm thinking it's because I'm so worked up about all of this diarrhea. It has me so worried, which doesn't help IBS-Ders. I'm just so anxious and nervous and that is most likely why I have lost some weight. My hair is sheeding more than normal to, which is also stress related.
I've had all the tests (colonoscopy, upper gi, small bowel series, etc.) too and the GI specialist still says it's IBS with Diarrhea. I should trust him. But for us with IBS-D, we feel like we need to have a "reason" why we are having diarrhea / loose stools constantly.
My GI specialist put me on LIBRAX, didn't work. Then he put me on LEVSIN, didn't work. The fiber did help a little.
I called my regular Dr. and she put me on Evalin 25g , an antidepressant. I'm hoping it helps the stress and anxiety. I just started it last night. We'll see what happens.