My puppy seems to become very aggressive in the evening with my 2 girls when they are sitting on the couch. She growls and tries to lunge or jump up on the couch to get to them. Is this normal behavior or should I be concerned about this aggressive behavior?

This sounds like normal puppy behavior and not aggressive behavior. 7-week-old puppies need about 18 to 20 hours of sleep per day in a quiet environment. Create a daily schedule for you and your puppy.

A way to ensure enough sleep might be to create a routine. Here is an example;

Morning Schedule:

Wake up
Take puppy outside to go potty and give them a high value treat when they go potty. My dogs LOVE the Lamb RedBarn cut up into pea size pieces.
Provide a food toy such as a Kong Wobbler, Kibble Nibble Ball or Kong filled with your puppies’ breakfast and let them work on that while you get ready for your day.
Once you are ready and your puppy has eaten all of their food you can take puppy outside to go potty and give them a high value treat when they go potty.
Now you can start to play or practice training with your puppy.
If you are leaving for the day, you can put your puppy in an Dog Pen or Crate in a quiet place so your puppy can sleep for the next 2 to 4 hours.

Mid-day Schedule:

Take puppy outside to go potty and give them a high value treat when they go potty.
Provide a food toy filled with your puppies’ lunch such as a Kong Wobbler, Kibble Nibble Ball or Kong and let them work on that while you get ready for your day.
After eating, you can take puppy outside to go potty and give them a high value treat.
Now you can start to play or practice training with your puppy. Remember, that puppies need constant supervision.
You can put your puppy in an Dog Pen or Crate in a quiet place so your puppy can sleep for the next 2 to 4 hours.

Evening Schedule:

Take puppy outside to go potty and give them a high value treat when they go potty.
Provide a food toy filled with your puppies’ dinner such as a Kong Wobbler, Kibble Nibble Ball or Kong and let them work on that while you get ready for your day.
After eating, you can take puppy outside to go potty and give them a high value treat.
You can have your puppy go into an Dog Pen or Crate so they can play and chew or you may consider tethering your puppy to yourself so you can supervise him/ her.