I am sorry, but I missed the part about Chewy being a puppy! What breed? Give him time. Before you know it he will be running twice as fast as you.

Make sure you have the crate in the bedroom so Chewy can see you and hear you breathing. You may need to let him out about half way through the night. If he whimpers then you can give him a sip of water in his crate and then tell him softly to go lay down. Praise him with a Yes! Good Boy when he does.

If you still have problems let us know.