Increase Supply?

I am a FTM and unfortunately for me I was not able to continue to EBF however I exclusively pump. I am able to produce an adequate amount of milk for my LO but I am trying to increase the amount so I can start a freezer stash. I am already working with a Lactation Consultant and some of the things that I have read about like Fenugreek and other products have side effects that make me not willing to try, so I only use ground Flax Seed so far which seems to work so far, just looking for additional things to try. TIA