It's good that you drink lots of water. That keeps keep your digestion running smoothly.
Depending on what I eat, I also get gas pretty bad. Usually I have it throughout the day. Food doesn't stay in me long enough to cause a noticeable odor so it's not usually a problem. The only think to do about gas is try and prevent it. Stay away from dairy, broccoli, eggs, gum is a huge one for me. I do not chew gum ever. I'll look like i'm in my first trimester if I do. I don't drink soda or eat hard candy. Carbs make me bloated anyway so I try to stay away from those and excessive sugar. (no, chocolate, candy, cakes, ice cream).
If your gas gets painful, beano before a meal prevents it, also gas-x after a meal works well too. I don't mess with those too much though since a little bit of air in your tummy is good. It keeps things moving along.
One other alternative is runnning. Somehow, while you're running, your body absorbs the gasses in your intestines. I've never had gas after a nice run.
Ok, pressure to go #2, but you feel like there's a shut off switch. Initially, I experenced this too. Since you have no large intestine, you can't store as much food as you used to be able to. Therefore, your meals have to be much smaller. Eating a huge thanksgiving dinner in one sitting is out of the question (for me). I'd be miserable. Instead, I started eating very small portions throughout the day. Instead of 3 big meals, I eat 6 small meals a day. I'm never excruciatingly full and don't experience the "shut off" switch any more. Also, I try to eat some kind of veggie with each meal to keep things flowing along. I mostly stay away from fruits for sugar and they make me gassy. Especially apples!
"going" now is a quick process for me. About 7-8 times a day depending on my diet and a very small amount. About 1/2 cup i'd say. And no pushing required. When your body needs to empty itself, it'll let you know. And pushing puts a strain on those stiches that are still healing (a very delicate area that you want to take good care of. A very small portion of your rectum still has uc so you don't want to irritate it.)
loud flatulence. Yes, this is something i've struggled with for years. I'm now 22 and have been trying to figure out ways to quiet this occurence since I was 14. There are a few tricks. Flush at the same time you think there will be a noise. The noise is usually quick so the flush works. You'll get to where you can time it so the loud rumble at the end will be in sync with your bm. Then, of course, you have to flush again when you're done. It also works well because it's a courtesy flush, although there's usually not much of a "normal" smell. Another trick is to take a few sheets of tp and hold them over your bum while you go. If there's a lot of stool, just let it drop into the toilet and get another wad. This, in combination with the syncronized courtesy flush works great. I can usually get away with going just about anywhere (although I hate bathrooms which are connected to the bedroom/living room or that have tile floors, etc.) i've become hyper aware of bathroom necessities. You will too:)
if it hurts to go, give your tummy a break. Stick to water for a day until you clear yourself out. Then ease back into it with small intestine friendly foods like toast, applesauce, mashed potatoes with a salad (can't forget the greens!) to keep you from binding up. You'll feel a ton better.
Finding the right balance is key. After I had my surgery, I had no idea what to expect. I kept track of how different foods affected me, stool consitency, gassy, constipated, came out whole, diarehea sp?, etc. Then, I took that and mentally made note of 'safe' foods. Of course, I goof every once in a while, but for the most part, i've got it down to a science. Also, watch your sodium intake. Since I don't have a large intestine, I retain more water than normal. Like P percent more. The only way around swollen ankles and a puffy face is drink gallons of water a day and do not consume salt. Period. I hope you don't have this problem though.
As far as sharp pains, i'd say try to eat smaller meals more frequently. And stay away from foods that make you gassy or don't digest well (popcorn, corn, broccoli, dairy, soda)
hope this helped.