Talk to Gynecologist on Relactation After Using Contraceptive

I started taking combine contraceptive pill called YaZ in mid February. My baby had slight oral thrush at that time. She gradually decreased nursing as the thrush grew. Now thrush is gone but so is my supply. I have stopped taking the contraceptive as soon as I got to know it was interfering in nursing. My baby hasn't nursed in a month. I want to continue nursing and increase my supply. Plz advise medicine. And advise that how long does it take to reverse the effects of contraceptive pills if I took it for a period of one month and a half.