Can you help me with this FaceBook friend request glitch?

Okay… so at around 5:30pm I got a friend request that I didn’t accept right away because I wanted to check out the profile first. When I got there later, at around 6 or so, I noticed that the friend request had disappeared. I searched the name and nothing came up, and I still have the email and everything.

Is it possible that the person blocked me, was it just a glitch, or… what?