Congrats on your baby! What I found that worked for me is when he bites you make a sound like you are crying and make your hand limb. That will definitely get his attention and he ll stop wondering what had happened. Then ignore him for 10 seconds or so. He will know later that he hurt you and thats why you cry. This behavior you can see with animals playing. If they are playing to hard the other one will cry and they stop. My Maxi did the same thing to my hands until I started doing just what I described above.
