The stress of living with you Mom is probably leading you to get sick. Work on getting well as soon as you can and get out of there. You are 27 and don't need this drama anymore. Go back home to your country or to your Dad's? Let her figure out her drama and do it now while she is relatively young enough to handle it herself. Don't stay long enough that she is aged and well dependent on you.
Don't believe anything she says, don't get involved in any fights, walk away and detach.
Have you read any of the stickies above? Have you joined a support group like Alanon yet? I encourage you to steer this boat and save yourself.