My pms's so severe that it had begun to take over my life,wreck relationships,ruin jobs,studying and cause me so much emotional pain. what should i do?

Consult: Consult with your OB/GYN. S/he can discuss options such as adjusting your hormones. there are mental health medications that can be helpful with this problem, but see if there is a more basic solution first.

Emotional pain: I would have your doctor refer you to a Psychologist. Your emotional pain will be taken care of over time and the Psychologist might also recommend you see your Primary Doctor.