My daughter bit me a couple of times also when she first got teeth. After the 4th time, I looked at her and sternly said "NO". She started to cry and rolled off. I was afraid she thought I meant no to eating, but 4 hours later she was ready to eat and, after that, she didn't bite. You have to be stearn with them. When she first bit me, it surprised me so I had a different look on my face, she smiled, I smiled and we ended up laughing. Therefore, she thought it was a game. So, we have to teach them it is not a game.
Good luck!