dont worrie thats typical after the first time its probably a uti thats common you normally get thoses if it was not clean or somthing if it does not go away drink water and cranberry juice it works i get them all the time if you are concerned after a couple days and it does not go away go to a doctor
It could be a bladder infection or you could have irritated your urethra while having intercourse. If it goes away after you go pee a few times then it was probably just irritation.