breastmilk supply dip

M 👱🏼‍♀️
My supply was amazing I would pump 8oz a session on average. I can only pump 5-6 times a day because of work but over the past week it's dipped. I'll get 3oz max. I've tried pills, hydrating and other tips. Anyone have any suggestions? I EP and my LO is 4 months. Anything I can do to bump up my supply?