My girlfriend has a court date on the 3rd for domestic abuse. Will she be going to jail?

She snapped and kicked her mom a few times and pulled her hair before the cops were called and she got arrested for domestic assault. They just took her in and processed her and then put her out on her merry way. It was a misdemeanor in Virginia and according to a VA Court's website it states...

http://www.courts.state.va.us/courts/jdr/lynchburg/violence.html

"Any person who commits domestic assault and battery or family abuse shall be guilty of a Class 1 misdemeanor, punishable by up to 12 months in jail and a $2500 fine."

This was her first offense ever and I am trying to calm her down because she thinks she'll be going to jail for awhile. Her family doesn't hate her. Her brother apparently is going to be put on the stand as a witness even though he hit my girlfriend, so hard her glasses came off, after she hit their mom. Obviously she can't afford a lawyer so I told her that the court will automatically give her one thanks to due process. But she doesn't know what to do and her court date on the 3rd is for alcohol/drugs, a psychological test, and for anger management but I don't know what else coincides with it if they decide to sentence her or not even though she automatically plead guilty.

I told her to tell the lawyer whenever they give her one that her mom provoked her to her breaking point, which is true. Her mom told her that she was going to be alone and she was fucking up in life. All because she vented to a coworker about her parents not helping her get a car and the coworker said something to the mom. The mom also has hit her since she was little but she never called the cops and the mom deserves to be in a rehab facility after practically neglecting her and her two younger siblings choosing an addiction of eating ritalin over taking care of them.

So any help would be greatly appreciated.

TL;DR:

• Girlfriend kicked her mom a couple times and grabbed her hair before cops were called
• Cops arrested her and charged her with domestic assault but just processed her and put her out on her merry way
• Court date is on the 3rd and she has a drug/alcohol test (has never taken drugs or really drank alcohol in her entire life), a psychiatric eval, and an anger management session.
• She thinks she's going to jail and her brother is being put on the stand against her as a witness.
• Her family doesn't hate her and she still lives with them.

Thanks guys.