hi,
i think we need some more info from you - can you post his daily schedule?
also, when he wakes at 5am, is he crying for attention or is he just playing? if he's just playing, i would leave him & see what happens. he may go back to sleep on his own.
it also sounds like he's hitting separation anxiety - pretty common at this age. you can help that during the day with peek-a-boo and telling him you will leave the room & come right back - and do that a lot.
HTH a little