any laws in Georgia about Harassment and undo stress caused by boss when totally uncalled for?

for about a year my boss was pretty much a non show owner. but when she did come in she always screamed and yelled at her employees. during most of that time she left me alone since I was office manager, HR, Payroll, Financial Controller, and more. I also had her back when other employees became irate or upset always. we just had an extensive Dept of Labor investigation and was found to be unpaying overtime hours. again, I had her back explaining, getting records etc. She got a new boyfriend in December and brought to work at the company. He's okay, tries to keep her under control somewhat but even that has proved impossible. she is in the office everyday now since he's there and has began harrasing me on a daily basis. she has no clue what all I do but still wants to say how long it should take. she gives people a task she wants but before you can finish changes you to something else (her new priority, it changes daily) then in a day or so ask about the first project. when you say it's not finished then it's your fault. She not only harasses but Screams uncontrollably. throws things. and talks to other office workers about you behind your back. she is totally out of control. it's not only me, everyone there gets her rath over and over! she don't remember things but tells you that you are crazy. please please tell me what I can do? I am 54 and although 25 yrs experience can't find other work. I am sole provider for my disabled husband and 77 yr old mom. I have even asked time and time again to just put me on salary. I can work all I need to do what she wants but she won't (and I'm never out). I was there at 10pm to get payroll done when my only daughter was on life support. I left in an ambulance one day but was there the next morning (against doctors advise). I've never been written up for anything. but now because I've told her not to scream at me. we can talk civil she is inventing things to complain about over and over. I know she is going to fire me soon. I live in georgia. please help?