Any pain? Especially on urination or on palpating your prostate?
How is your urine stream? Weak, all over the place, or still pretty strong?
See any of those have it checked out. If it worries you have it checked out. It's not a big deal. They'll probably ask you a few questions, do a urine check, and probably a rectal. Then you'll have answers.
To avoid embarrassment look at any changes to how much or when you drink.