Too much sex can cause this problem as well. When I was shooting models when I was first starting out, I didn't have the resources to pay for male talent so I was doing the scenes with the girls myself. I was having sex up to 3 times a day for long periods of time. I noticed I had to go to the bathroom at least twice during the night. When I stopped having sex than much, I noticed my tolerance to take a piss was much higher.
Either way, you should get that prostate checked out just in case. All the best and hope it's not serious
