Thanks for the query.
There is possibility that you may be having vaginal and urinary tract infection
You should not use over the counter medicines as they can increase the resistance.
So you once consult gynecologist and get examined to find out the actual nature of the problem and take treatment accordingly.
Meanwhile take plenty of water, sitz bath which can give some relief.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429