Vagnitis is a generic term that can mean yeast infection, trichomoniasis or bacterial vaginosis. If left untreated, a yeast infection will probably clear up on its own in time. (There are also certain foods that you can eat to help clear up a yeast infection- yogurt and probiotics.) Bacterial vaginosis and trichomoniasis left untreated make a person vulnerable to other sexually transmitted diseases and sexually transmitted infections including pelvic inflammatory disease and HIV.
I realize that you are a virgin but I strongly suggest that you see a doctor and get this cleared up. If you're absolutely unwilling to go to a doctor, you should get a yeast infection test kit to see if this is your problem.

i'm in the exact same position as you, im under 18 and reallllly dont want to talk to someone, i have same symptoms as you...

i have the samething people say you should use yogurt im under 18 and don't want to tell my mum