Sounds like a yeast infection. Yeast infection is caused by a fungus called "Candida albicans" which is normally found in small amounts in the vigina. This infection is often found on people with weakened immune system, in most cases it is not the sex activities which bring women yeast infections.
Women with yeast infection may develop any of these symptoms including:
Pain/itch/burning at vulva area
Pain/itch/burning in vagina
Pain during intercourse and/or urination
Cottage cheese like vaginal discharge
Swelling and pain around the vulva
You may try to eat lots of yogurt or put it directly on your privates. (plain yogurt only) Yogurt may help to bring back the balance of good bacteria and bad bacteria. If things continues, i'd rather suggest you go to doctors and get presriptions. I know a website (99eyao)provides online service for free, maybe you could consult the online doctors for an alternative opinion. Hope you'll be fine soon.