Hey SB, you're welcome! I remember those days--when IBS ruled my world & my husband thought I was antisocial & just no fun...now he's the one who doesn't want to go to parties & I do! One day you'll look back on these times & Smile w/ gratitude that its passed...And because the rifaximin is such a "cutting edge" treatment for IBS, it sounds like you've got a good doc. It seems though that most people on the Xifaxin for only 2 weeks do better at first & then regress...Those who stay on it at low doses after the first 2 weeks(200 mg/day) for up to 3 months seem to have the most lasting progress. And pls, pls, pls take probiotics. The antibiotic wipes out all bacteria in the intestines, not just the bad...I have good luck w/ PB8 & others...but it needs to be high dosed after the course of antibiotics...Like Judith, I've had great luck w/ the fiber, not the calcium...calcium treatment seems to help the most those who have IBS-D after gallbladder removal...But I tried every kind of soluble fiber before trying Metamucil/psyllium because lots said it causes the most gas. Of course I have the best luck with it...no gas problems except the first 2 days...I went straight to the high dose of 2 T in the am & 2 T before dinner...really firms things up & is also very healthy for the colon & promotes the good bacteria...One other thing that helps me alot is taking plant-based digestive enzymes BETWEEN meals. I've read that's best for those of us w/ gut inflammation & I believe it because taking them w/ meals didn't really do much for me. Also cutting out all food additives helped me ALOT.Good luck, this WILL pass, just hang in there...Talissa