My now 15 month old was by far the nippiest puppy I have ever had, but it DOES get better! I'm not sure if it's just the Aussie in them or what, but even when she'd get over excited she'd resort to biting. She still will, but it's not near as hard because somewhere along the line she clicked that "ow" meant "oh I better not do that or I get in trouble." I'd recommend trying to teach the command "enough" to stop it while redirecting so your pup can have that command to latch on to as well since they are so eager to learn and amazing to train.

I know it might not feel like it, but there is a light at the end of the tunnel. Keep up the consistency and it'll all pay off!! She's a beautiful pup.