I can understand the distress you are being through. It is more likely that you have had trauma during sex which has caused minor cut and now has resulted in pain. It is very normal sequale. However, what we don't want is any infection and the healing of sacred has to be proper. Excessive itching, fluid discharge, redness, swelling etc are the signs that suggest infection. In such case one should consider strongly to consult a surgeon as he can start with some antibiotics that can be taken for a few and then stopped. The pain would generally subside after a week. I would suggest to consult a local general surgeon soon. Regards Dr Pankaj Borade