Mini-pill and decrease in milk supply

My OB said the Nora-be type of mini pill birth control I stared taking when my baby was 2 months was safe while breastfeeding but I’ve noticed a huge supply drop and I’m wondering if that’s what’s causing it… I’ve tried extra pumping, fenugreek, more water everything and I can’t get more than an ounce or 2 when before I had plenty of milk to go around! Did anyone else experience this after starting mini pill birth co control? I’ve been on it a month now and just stopped taking it but nervous my supply won’t come back :( perhaps I should try the prescription? Curious about other mamas experiences (LO is now 3.5 months)