Don't worry...dreams are rarely exactly what they seem, and it doesn't mean you're a lesbian. I've had dreams where I was really turned on and having sex with this somewhat famous male stand-up comic whom I find incredibly unattractive, and I know that's not the same sex, but I was surprised by it, because I knew I had no sexual interest in this guy.

Dreams might have meaning (as Rhapsody said), but they usually don't tell you clearly. If dreams did tell you exactly what you were, felt, etc., then a lot of people would be going to school or work in their underwear, or NAKED!