I keep having dreams of having sex with a girl

I’m straight but for the past two nights I’ve been having dreams of sex with a female. The first dream it was with a lesbian friend of mine but in the dream we didn’t actually have sex but we were about to. And the second dream it was with a total stranger and we actually did have sex.

I’ve never had sex with a girl before and in both dreams I was scared and I was completely turned off in the second dream but kinda turned on in the first and only a little scared? Wth?