I feel your pain, OP. 17, you say?
I think his real question is: how does a 17-year-old dude suggest to his girlfriend that she 'visit her OB-GYN' or 'do some washing down there' without causing a major war of words and possible dumping/breaking-up?
BTW OP, it does smell a little funky down there. Now how funky, it's a judgment call.
Edit: Good lord, I just googled some images of yeast infections and I threw up a little in my mouth.:shocked: