I am really scared when its bedtime because for about a  year now, I will be awake at night walking to the bathroom, next thing I know is pain when im hitting whatever is in the way after I've fallen.  The only thing that might be a cause is my 40 mg prozac a day, just started seeing a dr. who will put me on heart monitor for a few days soon,  but I feel as though its in my brain.  I also will stand motionless in one place for minutes and then fall. I also kick and roll and talk.  It happens 2-3 times a week sometimes more. last month I hit my head so hard I had a concussion.  I do drink a lot of caffeine,  I'm exhausted as well as my husband because he often watches over me.  Our mattress is on the floor so I dont harm myself further.  I can say sometimes I'm sleepwalking sometimes I'm awake but I always remember things after falling.