Increasing milk supply!

I am back to work full time and DS is 4 months old I pump 3 times a day while at work but my supply is slowly going down! Anyone have any suggestions on what to do to help?? I have been pumping on the weekends after he eats but its not doing much! Do things like Fenugreek really work? TIA!

make some lactation cookies with steel oats brewers yeast and flaxseed they will help your supply and taste yummy

Mothers milk tea! it got me threw a growth spurt sanely. lol.