Memory loss after one drink

I went out with friends today, I only bought one beer and i woke up on a bus far far away from my house. I literally had a little cup of beer and thats it. I am not on any medication and I’m really weirded out by this. I don’t even remember half the night???? i had to pay for an uber back and my head feels weird like I’m in a different universe. I have never felt like this in my life and my body aches, and somehow I have someones phone. I’m so paranoid that I have robbed someone