Confused

So I’m a 18 year old female and for as long as I can remember ive always questioned if I like girls, but I always told myself no and that I like boys. Well now that I’m older, I’ve had boyfriends and I’m very sexually active with guys. Until last week when this girl walked into my life and now I’m questioning everything. I’m mostly worried about the sex because I love sex with guys but kinda have feeling for this girl. I think. I don’t like when guys go down on my so I couldn’t imagine likening when a girl does it. Idk I’m confused and scared right now.