I'm sorry! But it happens.
There is a story that *I* was dropped as a newborn (or rather just fell). It is a fuzzy story of me being left unattended on a table or something. And I still turned out reasonable well!
Once I fell down a few hard steps with my DS in a backpack carrier, and my ankle was hurt so bad, I couldn't get up and had to just lay there on my side (outside!), until I gathered myself up enough that I could crawl to safety. That was fun. I can laugh about it now. I couldn't see him at the time, but I can just picture him back there at that awkward angle wondering what the heck was going on. Thank goodness I had him buckled in the backpack!
I think I have bumped most of our DC's heads into a door frame once at sometime or other while carrying them. It is just one of those things. It could be worse, right?