I feel like the worst parent ever....

My 20 month old was randomly awake tonight at 3am. 4am we had already tried rocking and it didn't work so I put him in his crib for a bit. He starts tearing his sheets off. I sit him on the bed with his Pooh Bear so I can fix the sheets. I hadn't even touched the sheet and I hear a thud and look to see him laying in the floor. He starts squalling.

Nothing like this has happened in the 20 months he has been alive...

I kept him up an hour. No pupil changes, light sensitivity, or change in behavior/communication. He wasn't anymore sleepy than he was prior. He does have a bump on his head, but he didn't wince or cry when touched and is sleeping soundly now.

I just feel like the worst.... I'm so sorry baby Pooh.