Okay, buy yourself some ear plugs so you can get some sleep, because there is no instant fix for this. Sadly, by going to scold when she is barking, you are actually "rewarding" her bad behavior.

She sounds like she could really benefit from a basic obedience training class with YOU - so the two of you can learn to respect and understand each other. That, and crate training, so she has a place where she can feel safe and secure enough to be quiet.

She sounds like she has separation anxiety, which is real and treatable. It will take a little time, but you and she will both be happier once it is under control. Do a search for "separation anxiety" here - there are many discussions on it.

We'll be thinking of you!