With proper treatment, 90% of vaginal infections go away within two weeks or less depending on the type. Untreated vaginal infections can last with or without symptoms for years.
It is recommended that while taking treatments for vaginitis you practice the following:
Do not insert anything into the vagina except for medicine or tampons.
Use pads during menstruation if you are using medicine or creams within the vagina for treatment.
Take a break from sexual activity until symptoms clear up.