Hi and welcome.
Congrats on your new little one! Yup, it's patience patience patience as far as the crying at night and potty thing. It's such a pain to go through, but you will get there. You could try comforting things like a Momma-sized stuffed dog to cuddle with, pheromones, aromatherapy balms rubbed on ears, white noise machine (!!!!).
As far as the mouthiness - you have it correct - it's a puppy thing and a teething thing. Puppies learn a ton via interacting w/ the world thru their mouths, so they want to mouth everything. EVERYTHING. Continue to yell "ouch" and/or make a yelping sound like her littermate would make if hurt by her. And then hand her a toy instead.