How Can I Restore My Breast Milk Supply After Stopping Espiride Pills For My 28-week Preemie Twins?

Hi am a premature twin mom my babies were born at 28 weeks and they are 4weeks 3days old... After birth I was struggling with mik the doctor gave me espiride pills I recently stopped taking them as I was becoming addictive as I couldn t control my moods but now my milk is drying out what can I do?? I really need to produce milk to help my babies to grow