I had a uti when I was 15 years old. It sucked, but the funny thing is I don't remember how I felt. Sunday night I had bad bad pains in my lower stomach and pelvic region....I couldnt suck in, sit down or bedn over. It hurt so bad. I also had the gas you mentioned. As of saturday morning, I had to pee all the time, and it kinda hurt sometimes. I felt like I had to pee and then I couldnt sometimes too. I've been tired and nauseous too. I had a really hard time sleeping. If it keeps up through thursday morning im going to go the docs office and get myself checked out.
Anyways---i read somewhere(dont remember where, might have been the docs office), but if you drink milk you are 6 times less likely to have a uti/yeast infection but----you are 6 times more like to have a uti/yeast infection if you get eaten out. Just some info---dont take it as truth, im not 100% sure on that, but yeah.
Anyways, yeah---drink tons of water and cranberry juice.