My son would do the same thing. WE had him in a crib, and moved the bumper, and hed wake up every hour cause hed hit his head with the bars, so....I asked the dr and he said it was ok to move him to the pack and play (playpen)to sleep at night, and, problems solved, he started sleeping all night. He still sleeps in it, and it helps that when we travel I can take his bed wiht him and he feels safer. I know tat worked for me, you might want to look into it. I know lots of people dont agree with where he sleeps, but as long as the dr says it wont hurt his back or him at all, Im fine with it. Good luck!!