I found this site looking for concussion info. basically, I bumped the back of my head today. I've had one concussion a long time ago but I'm really not sure about this time. I'm in a wheelchair, and my brother wanted me to show him how I can lean back on my back wheels. I lost balance a bit and slipped back and the hard area under my head/ neck hit the edge of a table, my brother stopped me falling any more back, thankfully. I'm starting to get pain in that area now and I'm feeling just a little bit tired. but otherwise I feel fine. is the pain coming from my neck? I think I didn't hit hard enough for a concussion and it was the lowest area of my head. Don't know whether to worry though?