PERFECTLY normal puppy behavior! ; )

You need to consistently use whatever method works for you... what worked best for Fozzie was a stern "Nooo!" and ending any and all attention/play at that time. Whatever makes her stop in her tracks is the method that you need to use, and you need to do it every time. Puppies are new to the world, and they do not understand strange human customs. It's your job to teach her that you are not a chewtoy, nor are you another puppy that she can rough-house with. Manners do NOT come naturally, to any puppy. It sounds like she has a lot of excessive energy, too. Make sure you play with her several times a day, in the yard, and with a variety of toys and games, so she isn't so hyper.

Bite inhibition is also taught by other puppies and adult dogs. How often is she around other dogs? I suggest getting her into a puppy play class ASAP, and find vaccinated, friendly adult dogs for playdates, too. Gonzo did a lot of the work for me, as far as teaching Fozzie to be gentle, when he was a puppy.