Breastfeeding Mommies

Hey There Moms , Im 4 Weeks PP and Actively Breast feeding My LO as well as pumping inbetween feedings . I notice about a week ago my milk supply had started to decrease i was able to pump 6ozs a session between both breast so about 3ozs on each breast . Today ive started a new regiment pumping every 60minutes. My last session i was only able to get 1 1/2 oz between both breast how can i increase my milk flow before i have to resort to formula 😭😩😩