It could be urinary tract infection if you have burning and pain too along with frequency and urgency. Please drink atleast 3-4 liters of water natural cranberry juice, tender coconut water, buttermilk are all good for you. If the problem persists please consult a good urologist and get a physical examination and complete urine examination done. Please relax, for all you know it will subside on its own. Unless there is a voiding disorder that we can determine only with a scan pre and post. Whatever the diagnosis the bottom line is don't worry it can be treated.