PFM does your employer know your history with abuse? If you make it known to them, you can then ask for reasonable accomodation. That makes the employer responsible for making it easier for you to do your job.
I know...this economy stinks and we would give anything for a job but you have to take care of YOU. You and your child need you to be at your best. If that job is making you sick, you owe it to yourself to get out. I'll be thinking of you and hoping it works out.