It definitely gets easier, and she's got some real adjusting to do, depending on what her previous home was like.
Do you take her out for walks much? Exercise helps really take the edge off dogs, and play relieves stress. I'd also look for an obedience class to get into ASAP.......this will start showing her the boundries, teach you a lot about dogs and also build the bond between you. She's old enough to not qualify for puppy kindergarten but a good beginner obedience class would probably be fun. Classes ALWAYS tire out pups.