Help Please...18 month old not STTN

When he was little my dd was only 20 months old. We never let him cry as an infant because we didn't want to wake her up. She transitioned to a bed early as she was climbing out of the crib. Again we tried not to let him cry to much when she fell asleep.

He breastfed and was a small baby, and still is a small baby. I didn't want to give formula plus pedi said not to and continue breastfeeding. So at night he always ate. NBD, he slept a part of the night in his crib in his room and a part of the night in the pack and play in our room. As I needed some sleep to.

Ok now, he USED to go into his bed easy, tired and awake, falling asleep. in the middle of the night he would awake and my dh would pick him up for about 5 min or less and he would go back to bed. Now he is up to 3 times a night. the last time he did it my dh would put him in the pack and play in our room. He gets up for the day at 5 AM....

We tried CIO to go to sleep. He works himself up so bad he is soaked from his sweat. takes over an hour before he goes to sleep. Same thing in the middle of the night. Last night when I heard my dd moving around and able to awake and after 45 min of yelling and crying I got him. Walked him to our room on the other side of the house put him in the pack and play and out like a light he went until 5 am.

HELP I need sleep, he needs sleep. I don't know what to do..........