Yellowing toe nail. Fungus remedies

So this is really embarrassing for me (please be nice) I’ve had slightly yellow ish toe nails since I can remember. I always thought it was because of nail polish and not letting them breathe (I used to get pedicures every two weeks to a month)

Last time I went the lady told me I’m too young to have fungus and to soak in vinegar. I was extremely embarrassed - I didn’t know it was fungus.

How can I get rid of it ?? Other than the vinegar. I’ve taken nail polish off and have let them breathe for about 3 weeks now and did about two- three soaks with vinegar soap and Listerine. Its gotten slightly better but not much.

How can I make sure it doesn’t come back or worse?