My 2 dogs were fighting over an empty food bowl, one dog pitt-bull, other dog, yellow lab and pitt-bull mix. I tried to break them up, tried to grab both by scruff of neck, but somehow my hand slipped and was bitten on my index and middle fingers. Torn up pretty bad, ended up with 26 stitches. Now my fingers are numb, ever since being bitten. Got stitches out yesterday. Is it nerve damage?