Talk to Gynecologist on Menstral Problem

AFTER TAKING BATH FROM MY PERIOD IT AGAIN START AFTER TWO DAYS.DR SUGGESTED JUST N tablets but i felt no relex from menstral pain then she said that discontinue the just N and have period and said that on third day start famila 28.it stoped bleeding but now i am feeling pain in my left arm and left side which is one of the side effect of this tablet.plz advise me what should i do?