Hi dawg, sorry about the crash, it's never happened before, and shouldn't happen again.

Just do a check of everything before going to bed. Make sure your door is locked, windows are closer. Should make you feel more secure and get over that. Also, if it puts your mind at ease, your mind is still fairly aware of your surroundings, it just doesn't make it available to your consciousness. If your mind hears something out of the ordinary while you are sleeping, it will wake you up, so you aren't defenseless while asleep.