Helppp my friend is scared she has yeast infection!!! =(?

my friend thinks she has an yeast infection but i dont think she does. she never had but she's masturbated before. she said lately she's been having clear guey stuff in her underwear and once she said there was some yellow/brown stuff but mostly clear stuff. she's only 14 and shes mortified of telling her parents and neverless going to the doctor about it. im scared for her. plz tell me whats the problem...=(