What Causes Itching And Redness In My Vagina After Having Oral Sex?

Okay. I'm still a virgin. But I've been fingered by my boyfriend once. Only once. He has had alot of sex recently, but not with me. This one woman he's had sex with has had rumors saying she has Hepatitis C and The Clap. Here lately, I've noticed the inside of my vagina has itched and been like a deep red and my cum is kinda flaky if left alone for a while and just peels off like dead skin. I'm afraid he might have given me something. What does this sound like?