What items can I buy from the health food co-op to feel better?

Being pre-menstrual causes me to have night sweats, insomnia, anxiety, and depression. I am 100% awesome the rest of the month. Is there anything natural/herbal that I can during this week to get some relief? My Dr. recommended anti-depressants and anti-seizure medications to take when it hits, but that seems totally over the top. Recommendations?