Ouch! Sorry to hear that you hit your head. I've been staying at my mom's in the kids room for a couple months now, and there is a bunk bed in there that I sleep on. The bunk bed is like...really hard metal or steel. Every time I go to sit or lay on the bed, I have to be careful not to hit my head on the top bunk because it's so low. Well, the other day I was in a hurry...I leaned down to grab something off the bed and when I came up I smacked the back of my head on the top bunk. Luckily it didn't cause any worsening of symptoms, that I noticed anyway.

Hope everything turns out alright.