Falling asleep and falling down

Every night no matter how I try to stay awake while heading to the bathroom or sitting on the toilet, I fall asleep. I have put a hole in my retina (pucker) from hitting the sink corner, fractured 3 ribs hitting the shower wall...countless injuries, and I do this all over the house. It really makes me sad - unable to trust myself alone sometimes. Anyone do this?? I am very lucky that my cat comes to me and meows and touches my face to wake me up - many times before I get inured. Anyone have an animal who's helped you with narcolepsy or sleep apnea.