Exclusively Pumping help !!!

Shay • Living life on the hippy side , I run an animal sanctuary for exotics and other helpless unwanted critters . Married mom of two wonderful girls . Not a crazy crystal lady but heavy into mysticism and traditional plant medicines 💗 . Free spirited and poly

So my daughter is almost 4 weeks ive been nursing maybe twice a day and pumping 5-6 times .. During the last couple days ive been only able to pump maybe 4 or 5 times and my supply has gone down a little . how can i boost it and how long would it take ?