Omg i remember this, those little needles hurt like hell!
I felt just as bad as you cos i shouted at Lucy and even told her i was gonna pull all her damn teeth out if she bit me again! Lol i swear she understood cos she sat back tipped her little head to one side then nipped my arm.
Straight in her crate i can tell u while I had time out.
I no it doesnt help but he will grow out of it, it is just a puppy thing
Just hang in there n take some time out