Breastfeeding with Big Melons

Those who have larger breasts, especially on the saggier side, what positions do you find helps when feeding. Found out baby was using breast as dummy and wasn’t actually taking in milk and lost a considerable amount of weight 😞 feeling deflated. Have tried pumping with spectra s1 and did well first time, but seems to have slowed down. Have also been drinking camomile tea. Any recommendations on how I can improve my flow?