Can you really lose brain cells like this??!!?

So yesterday, I banged the back of my head extremely hard on the edge of a solid, wooden table. I lost by balance, and it was pretty bad. I was woozy for the first few minutes, but I never blacked out, and I remember exactly how the accident happened, and at what time during my fall my head hit the table. Yesterday I had a pretty big bump on my head where I got hurt, and gradually it has reduced in size, and it doesn't really hurt(except when I touch it). I told my parents, and I have been observing it, and so far there isn't really anything. So tell me, can I loose brain cells/memory/ or any other normal function because of this??