Yeast infection

Hey ladies I’ve got a question. So like a week ago I noticed that I was a bit swollen down there. I’m usually able to see the hole (tmi) but I wasn’t able to. The next day it was a bit itchy right outside the hole and it looked a little red. I did put my finger down there to check if there was a smell and there wasn’t. I had sex with my bf like 3 days ago and it burned so bad and it was just not enjoyable at all. Last time I checked (yesterday) it was still red, but I could see the hole now(still itchy btw). My question is, has this ever happened to you and what have you ladies done to make this go away fast? Any home remedies?