Go to a doctor and get tested for a UTI (urinary tract infection). This is very easy treat and requires antibiotics as prescribed by a physician.
Because everything is so close down there (vagina and urethra) it's easy during intercourse to get dirt/sweat/etc rubbed into the urethra which can lead to an infection. In the future, try urinating after sex to clean out the urethra and reduce the risk of UTIs. Good luck.
Urinary tract infections are a very common outcome of rough sex without enough lubrication. I'm assuming you're using some sort of risk reduction and birth control? If not, you're leaving yourself vulnerable to disease and/or pregnancy.
Always urinate after any sexual activity. This clears out the urethra of any potential irritants. Cranberry juice is also helpful in keeping your urinary tract healthy.
Now get yourself to a clinic for antibiotics. And get tested. Again. Dr. J
same thing happen to my wife we had sex she got pain next day , what i used do apply ky gelly then its become ok . may be there is problem in oganisam when i used condom also apply ky gelly to aviod the eritation on vergin.