Power pumping help.

🌻🌺Trinkster🌺🌻 • Mamma to my little man 10/02/18 and little girl 11/29/19

So, my normal pumping schedule at work is 3pm, 515pm, 715pm, 915pm and I pump when I get home at 11 or 1130. Where do I fit a power pump in there? I read I'm supposed to keep my normal pump schedule and ADD the power pump. Baby feeds around 1pm before I leave for work at 2. I need help!