Can a mild concussion kill you? I've got blurry vision and I feel yesterday. I didnt hit my head though. I just feel outta the bed on my butt. Got a small bruise on my back on the right headache and sharp pains in head and neck

Rattle the Brain.. Blurry vision, especially after a fall...I see no better time to see a doctor immediately.
You need to see a. ...doctor. It's possible to have a concussion even if you didn't hit your head. The blurry vision in particular worries me. Also I would want to know if there was some underlying problem that contributed to you falling out of bed. Again, please see a doctor.