Lactation help

Right now I'm eating lactation cookies & drinking a fenugreek & blessed thistle powder once a day plus pumping after every feeding. I'm about to add a cup of mothers milk tea to this as well. Nothing's really helping to increase my supply & I've been supplementing with formula 3x a day. I've heard there's a prescription that can help increase production & was wondering: for those who use it, food you get the prescription from your regular doctor? Or is there anything else I can try?