awww, poor Webster....I can't give you any advice regarding what you should provide for your baby, but I just want to let you know that I am praying for Webster's health and fast recovery. Considering he's still a baby, maybe you should take him to the vet just in case....from what you're describing, it seems like he had quite a shock when he fell.
I dont' know if Webster can jump up on the bed by himself, but with Mason, I only let him on the bed when we're going to sleep. The only time he gets on the bed is when I turn off the TV, turn out the lights, and get under the covers so he knows that we're ready to go nite-nite

. Maybe you can restrict Webster's access to your bed so he doesn't get too hyper playing and miss a step again? Just a thought.
Hope Webster is doing better today