<human>: Could you distill the essence of the text into 1-3 sentences?

I have recently had a one night thing with a girl. I was drunk/she was drunk and I met her on the night. 

She came back to mine and stayed over. In the morning I was dying to ask for her full name or her number but she seemed really disinterested so I didn't and just let her leave. I basically wimped out..

Since then whenever I think of her I get a sinking feeling like I've really messed up and missed a chance at something and I don't know why. I don't know her. I think I could probably find her since the club we were in take a lot of photos and put them on Facebook. 

Would it be weird to you ladies if a guy you had a one night stand with hunted you down via Facebook to ask to get your number since they were too scared to ask in the first place and if not then how can I go about it?
<bot>: slept with a girl, too scared to get her details in the morning. Massively regret it and want to find her. What do?