How did you get rid of a stubborn yeast infection?!

About a month ago, after I got off of an intense round of antibiotics so I could get my tonsils out, I got the MOTHER of all yeast infections. I took the monistat 3 day treatment AND prescription diflucan after the monistat didn’t do shit for me. I haven’t had any itching so I though it was over. Well, my boyfriend just got back from his 3 week annual training and when we had sex my vagina STILL swelled up and started stinging like I still had the yeast infection! It happened before he left, too. This is honestly depressing and has ruined my sex life. I need ways to kick this to the curb stat. I can’t handle this anymore. What did you girls do to get rid of a stubborn yeast infection? It seems nothing will work for me.