Feel like I'm constantly peeing

For the past three months(since I've been with my boyfriend) it feels like my bladder is constantly full or that I have to pee. I doesn't hurt or burn and I almost always go to the bathroom when we're done having sex, so I'm not sure what it is. It doesn't matter if I drink a lot or not, I just feel like I always have to go. Anyone else ever feel like that or had problems like this before?