Three year old wakes up in the middle of the night and refuses to stay in bed.

My son for the most part has always done well sleeping. Once hes in bed he tends to stay asleep till morning. He does have occasionally episodes like most kids, but nothing we worry about.Well a week ago I let him sleep by me during his nap time as I was tired too so we both slept in my wife and I's bed for his nap. I think this was a huge mistake as he always wants to sleep in our room now. He sometimes will go to bed at first but wake up in the middle of the night and whine until one of us goes to him. We have to put him back to bed about 50 times till he actually sleeps. Each time telling him he needs to sleep in his bed. Which causes him to cry and get out of bed as soon as we leave the room.This uaually takes a good 2-4 hours to get him back to sleep. If I knew just letting him sleep in our bed once, even just for a nap tap would of led to this, I would of never done it. Is there anything we can do to get him back to sleep on his own? via /r/Parenting http://ift.tt/2qm6Fdv