Teething puppy?

He needs some chew toys.

Teething is a normal process and can be painful. The chewing helps with the pain, helps relax and helps break the new teeth through.
You may occasionally find a small tooth laying about. Don't get upset, its just a baby tooth.

Should be Ok unless he begins to shred it. Then pull it out and replace it.

Perhaps he likes the feel of the bed more than the toys. Try offering a plush toy. Be sure to remove any hard plastic bits, like eyes, nose, mouth....... The pup will find those plastic bits to gnaw on them, eventually, these will come off to be swallowed.