Some Pain After Peeing?

Hi. I'm on bc pills and have been for about 9 months. I've never missed a pill and have only been late taking them a few times, but only like a few hours late. I'm pretty sure I haven't even been late taking them anytime in the last two weeks at the least. My boyfriend and I had sex on sat. (jan. 7th) and everything was fine. I don't usually take showers after we have sex, though. Usually not until the next day. I don't pee right after either. (i'm going to start doing all this though, since I just now read that it was a really good idea.) well, just today (jan. 10th) when I peed it smelled kind of funny. Not disgusting or anything, just different. And at the end it kind of hurt a little bit. There was also just a small amount of pink on the tissue and I don't know where exaclty it came from. That only happened this morning- I peed a few minutes ago and nothing was there. I also kind of feel like I still have to pee even though I just peed. This isn't pregnancy or anything is it? Is it a uti or something like that? If so, what can I do? Thanks.