My Daughter Is Concerned That She Might Have PMDD. A

My daughter is concerned that she might have PMDD. A few days before her period, she gets very depressed angitated not wanting to get out of bed and wanting to cry. But a couple of days after her period begins the symptoms are gone. She is 30 years old not married and no children. She does not want to get on medication . Can you suggest any natural ways of easing these symptoms. She does have a dr appointment but she wnats some info before she goes in to see her OBGYN? Thank you
Concerned MOM