I found a solution to that common problem 10-15 puppies ago. I have been sharing it ever since I stared answer question on the net 7 years ago. It and many other things that may help are in my sticky at
https://www.askmehelpdesk.com/dogs/i...tml#post251802
You may have a little more trouble with your puppy for removing it from its mother and litter too soon. 7-8 weeks usually works well. Try to find well cared for puppies and dogs for it to play with to make up its mother and litter. Your puppy may or may not be safe if exposed to parvo. If the mother passed immunity on, the shots will not take until it wears off. After that, one shot, 2 weeks before being exposed to parvo, is all that is needed. The usual practice is to give a series of shots hoping to hit the window between the mother's immunity wearing off and being exposed to parvo. See
Canine Parvovirus, What you should know about
Letting him sleep with you starts down the road of letting him run the household the rest of his life.