As far as I know, sudden baldness or hair loss caused by stress or some traumatic experience, usually gets reversed once the stress in gone. It would take time but your hair would go back to normal. As, you have specified, hair loss doesn't run in your family, so it is quite unlikely you would...
I don't think you should take any medicines on your own. Consult a hair loss expert, who will diagnose your problem and then accordingly prescribe you medicines. Taking medicines without consulting a doctor can worsen your hair condition and lead to more hair loss.