you should have written your age.
You must get Gynecologist consultation. this could be because of infection or some other lesion.
you can start with Tab. Metronidazole
400 mg three times a day. this is an antibiotic which is useful in gynecological infections you can take it for 5 days. side effect of this drug--metallic taste
. do take it after meals .
proper treatment can be started after examining you.