Hi Merri -
I was nodding my head the entire time I was reading your post! That was truly my life! I was always very worried about any event i was attending, always made sure I had a stash of Immodium "just in case" and even avoided some situations b/c I was afraid of an attack. But let me tell you, after trying mulitple drugs for IBS to no avail, my PCP put me on the lowest dose of Zoloft and my life has changed dramatically! I still get those thoughts, but they are fleeting. And the more events I attend "sucessfully" the less I worry about the next one. It is truly amazing and life-changing. I encourage you to work with your doctor to find the best solution for you, but I am living proof that anti-depressants do help combat symptoms of IBS!
Best of luck to you!