Thanl you appreciate that had it for about 3 days but its not been painful at all! Also if i do go for to a general health care provider does it mean my parents will find out?

Im a 16 year old virgin, yet have a white lump blocking my vagina and dont know what it is! Cant be an STD or STI as never have done any sexual activity including someone else! Anyone else know what it is?// thank you