Kelly - it's me again - I just went back and read the other post of yours. I just want to add that I was completely "normal" one BM a day - until this all began for me back in Feb. At the time I was freaking out about this weird feeling when I swallowed, I thought I was dying and the doc sent me for tests. I have suffered with anxiety for years but it seems to get really bad when it has to do with my health. Anyways, I've never had the IBS symptoms until this time. Now it is like a runaway train - more doctors, more anxiety, more diarrhea, more tests, more diarrhea, etc. To top it off they found a tumor (not cancerous) on my adrenal gland which I have to decide whether to have removed or not.
Just want to add that I saw a psychiatrist a couple months ago and she said lots of her patients have similar problems with the diarrhea. And my therapist says the same thing. Made me feel better to hear that, so thought maybe it would help you, too.