Is it normal to question my uality?

I have been straight all of my life and i have never found any guys attractive or anything like that, but then last night i tried to have with a girl that i have been talking to for a little while now and i could not get an . I have been questioning my uality for the past 24 hours and i don't know what to do. I've been trying to ask my subconscious mind but i don't know how to. Please someone help me.