My son will NOT sleep in his bed. Last year he stopped sleeping with the light off. Nightlights will not work. His room must be 100% lit or he screams hysterically, to the point of making himself sick. He says that the monsters outside look in his windows when the lights are off. This all happened literally in one night. He was fine when I put him to bed, all lights off (he hated even a nightlight then). An hour later, he was a screaming, inconsolable mess. I turned the lights on, he was fine and went right back to bed. It has been that way ever since (almost a year now).
Now, he wont sleep in his bed anymore. He would rather sleep on his floor or beanbag chair. This wouldn't be too big of an issue except that since he has been doing it for the past 4 months, he has gotten incredibly crabby. You can tell he's sore, stiff, and miserable all day. He is also staying sick, I think because his immune system has lowered because he is not getting restful sleep (on the floor, which IS carpeted by the way, with the light on).
My question is, how do I get him to sleep in his bed with the lights off again? I'm just worried that it's going to really start effecting his long-term health and I am at my wits end.