It is difficult to arrive at a diagnosis on the basis of just the history you have given. Having anxiety, frequent mood swings and irritability are compatible with both borderline personality disorder
and bipolar disorder
. You have not described what you referred to as antisocial behavior, but abnormal behavior may be seen in both these conditions as well as other disorders too. However, I am more concerned about the nausea and the eating pattern that you have described. I feel she must be evaluated for an eating disorder
as well. Please consult a psychiatrist
. A psychologist
will not know much about medications.
Hope this helps you. Best wishes.