Thanks for the query.
There is possibility of allergy
to the material used in condom or there could be some vaginal infection
Better to consult gynecologist and get examined to find out the cause.
If that is not possible, you avoid intercourse for few days and take sitz bath daily twice.
Possibly this will help. If still the symptoms persist better to consult doctor
Without consulting the doctor better avoid taking any on counter medicines.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429