Any advice?
 

I bought a GSD pupp two weeks ago and she just turned 11 weeks and seems to be going through a stage where she won't listen, keeps biting, pulls to go home when trying to walk and seems to be going through a small fear stage also. I know this is normal puppy behavior but I'm not sure on what to do, I've taught her sit,down,stay,come even was able to walk around a park with her without having to hold the leash and she did fantastic but now she seems to be not listening to it at all, and going through like a "terrible two's" stage. Any advice would be greatly appreciated, thank you.

forget about stages. you have a 11 week old pup that
you taught sit, down, come and stay. that's impressive,
very impressive. i think you need to enforce what you
taught. with consistentcy in training, socializing and age
your pup will learn.

Absolutely this! Just keep working with the puppy, be consistent and you'll go far. Get him into obedience training when you can, because that's very helpful.