It might just be normal puppy behavior, bellajay, since pups are very mouth-oriented and can be very high energy. But it's very hard to tell over the internet since we can't see what her body language is like or what the context of the behavior is. I agree with Shay that your best option at this point is to seek out a trainer (do your homework and check credentials) to have an evaluation done. Luckily she's quite young and if there is a problem, you should be able to nip it in the bud.
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."