Antifungal medication

Does Fluconazole affect birth control? I took it 3 days ago but had sex yesterday & my bf thinks he came in me a tiny bit. I’ve taken bc for 3, going on 4 years now and my doctor never said that it bothers my birth control. My period is in 4 days so I guess I’m just nervous.

Also, it was just 1 pill, 50mg.