Overactive Bladder?

So I was kind of diagnosed with overactive bladder. I’m so confused because my pelvic floor seems very strong, I don’t drink caffeine, I’m not overweight.. I never have accidents and I can hold my urine. I just have a horrible pressure all the time. The diagnosis just doesn’t make sense to me. The urologist I’ve gone to is supposedly a great doctor but he is honestly the weirdest dr I’ve ever met. He doesn’t explain anything to me. He even gave me a medication and didn’t tell me why. I googled it and it’s for overactive bladder. Does peeing all the time due to pressure sound like overactive bladder? Should I seek out a different dr?