THIS TOO SHALL PASS
Bonnie was the worst biter when she was 14 weeks. Nothing I did helped. I yelped, I used bitter apple spray, I used clear deodarant, I said no bite, I walked off and ignored her. I though nothing was working, and doubted my ability as a mommie, but I kept it up and was consistant. Now at 13 months, she is a very sweet pup and hardly ever bites. If I have to remind her not to bite mommie, she starts licking instead of biting. I know it seems hopeless sometimes, but you will get there before you know it
Good luck