power pumping- how often??

DrBessy
Trying to increase my supply- tried power pumping (20 on/10 off/10 on/ 10 off/10 on) for three days straight and got no increase. Do I need to go longer? More than once a day?? Typically im only getting about 3-4 oz/day pumping 2-3x/day and would like to 1) get LO off of formula supplement, 2) start stock in freezer for going back to work. <and I’m also doing fenugreek, oatmeal, brewers yeast, fennel, water- basically everything under the sun>