Breastfeeding

Jammie
It feels like I don't produce enough milk during the evening. My son will tug and pull like hes trying to get milk. I ran to the store at 2am for a bottle and formula but he refused to take them so i put him back on the breast and he eats then falls asleep. I take 6 fenugreek supplements/day. Any other ideas how to keep my milk supply up?