From the symptoms it looks like vaginal infection
. To prevent this, maintain vaginal hygiene, wear cotton underpants, avoid hot tubs, don’t douche, avoid feminine hygiene sprays, colored or perfumed toilet paper, deodorant pads or tampons, and bubble bath. The treatment depends on the organism that has infected the vagina. It can be caused by fungus, bacteria or some other organism. So consult a gynecologist and get it checked by means of a cervical swab. Till then, use some antifungal pessaries like clotrimazole
(Femizole-7) or Monistat which you can get from a pharmacist.
Hope it helps. Regards.