Couldn’t get it up

I was being intimate with a very gorgeous girl I met while traveling and we met at again at a bar, had some drinks and went back to mine, she was very exited to do the deed, but I couldn’t get it up. Not one bit, this is a first for me. What’s confusing me is I’m on the road to sobriety, I relapsed the day before this hook up tho. Any insight?? All comments are helpful. Thank yall keep going strong!