for 4 months I've struggled with over supply, then under supply issues. I'm in an under supply stage - the worst, yet. Last night I had to supplement with a bottle for the first time. Today I pumped half of what I pumped yesterday at work. I'm not sure what to link it to. I think I've started ovulating, but already had my cycle pass last week. It's not a plugged duct or mastitis (we've been through that, also). Can milk just drastically decrease after 17 weeks of nursing? What should I do?