My gf's pussy stank

So this is a serious question and let me start by clarifying: when I say pussy I dont mean cat and when I say stank I mean bad smell.

So me and my gf are fucking and it's oral mouth to pussy time! I go down on her and there is that smell of fish bursting out and it's some strong stank, trust me, I gots to hold my breath...

Now I have done some reasearch and i've found answers but I'm not too sure about it anymore cause I have read that it's like a bacterial accumulation or something and you just need some anti-biotics to remove it permanently.
On the otherhand tho! I have told my gf and she refuses to believe it, she says it dun smell bad and it was like this her whole life. I showed her the pages but she doesn't want to see a doctor/pharmacist for an anti-biotics prescription and I'm starting to doubt myself.

Am I right to think Pussy stank is bad and it can be fixed with anti-biotics? If so what should I do? If not... well shit...sorry :,c

(Ps. We're both 19 and together for a year and half.)