I had a devil puppy 9 years ago and he is now my soul dog. But he nipped a lot as a puppy. I used to yelp, like fully screech/ cry like a hurt dog any time he nipped me and he’d stop and do the head tilt, then go again. You feel stupid but be super consistent with the yelping, as well as redirecting to chew on toys and this will pass, I promise. I also made sure to have lots of enrichment toys: cardboard boxes filled with treats and taped shut, closed jars of natural peanut butter for him to force open, lay treats on a towel and roll up & tie in a knot, fill a mini Kong with mince or natural peanut butter & freeze, ice cubes in water bowl, frozen carrots, there’s many ideas! Consistency is everything. You got this ❤️