10 week old puppy won't stop biting toes and hands

This is my first puppy, got her at 8 weeks old. During play time she gets a little too excited and locks in on hands and feet, and can not get her away from them. She ended up drawing blood on Monday, on me. And Tuesday on my fiance. Our trainer says to do the no attention, and let her get bored, but thats how I ended up bleeding. I know they have the "puppy biting phase" but I'm about at my wits end. I dont want to have to go down the dominance route. Any advice?