First things first...don't panic!
There could be many reasons why she is reacting the way she is. It could be that she doesn't like to be picked up. Maybe she is hurting? Have you taken her to the Vet?
I would work on training her with positive reinforcement and some socialization
Here is a link to a website with lots of training information. Start with basic commands and try clicker training too!
Learn how to train your dog
But first relax and don't get frustrated, because she will pick up on your moods too. That website has information about dog body language. This will help you better understand how she is feeling and to stop interacting before you get bitten again!
Finding a good positive trainer might help you too!