extreme pain after sex

I've had sex about 5 times with the same guy, once we over did it in the one day and I was in pain for the rest of the day but fine after that, the next day we were together we did it about 4/5 time but it felt so good and we use a condom I felt no pain at all during it or for the rest of the day but today (the day after) i have been experiencing extreme throbbing pain and no matter what I take or do it will not stop, it has gotten unbearable, someone please help