Hi So About A Week Ago I Got A Rash

Hi so about a week ago i got a rash like inbetween my vagina and butt, and it was really itchy and there was sorta a rash on my vagina. Also my vagina was had a bad odor. Then me and my boyfriend had intercourse and it was harder to get in then usual and my vagina wasn't producing to much lubricant. And then my labia got really swollen. And a couple days ago we had sex again and it was really hard to get his penis in.