Vanessa,
I am not sure but what you might be feeling is in the 'normal range' and that you may need time to allow your brain to adjust to the physical changes in your anatomy.
Gas? I think that I have a gas creating machine in my gut but by releasing it a bit more often (try emptying a couple extra times a day to remove all of that air)...I feel so much better.
If you are only emptying 3-4xs a day then it certainly isn't pouchitis in my experience (It could be an I do not want to belittle your concern)...but trapped gas and materials...you may just be allowing your pouch to overfill.
Always, Always empty that pouch pre-sex (there is no mood killer like huge gas bubbles rumbling around in there!) and use extra lube for the purpose of comfort.
I would also add that if the antibiotics are not helping that they may very well be hurting. They are stripping your poor pouch & guts of all of the natural, healthy bacteria that we need to help digest and thus causing more gas!
If at all possible, stop the anti biotics, go on a simple protien and soft veggied diet for a couple of days...Remove all carbs (flour products, rice, grains etc) and all milk products including yoghurt...give your pouch and body a break...Drink tons of tea but very little juice...you should feel an improvement in about 3-5 days.
Please try it and let me know.
Sharon