Advice

Sometimes I feel like theirs pressure on my bladder and I have to pee even after I've already peed. It doesn't burn when I pee and there's no blood. It isn't all the time, just once in a while. I drank some cranberry juice thinking it was a uti but it didn't do anything. Today riding in the car after about 2-2 1/2 hours my bladder felt like there was pressure on it so I stopped and used the restroom and afterwards it still felt uncomfortable. What could it be?