pumping struggles lately

Ok ladies I ebf my daughter up until 4 months when I went back to work. Pretty quickly after starting back at work I wasn't pumping enough and we've been supplementing with one formula bottle a day, and then I direct feed her twice in the morning and 1-2x in the evening depending on her schedule at daycare. About 6 weeks ago I dropped to 2 pumping sessions a day (once in the afternoon and once before bed, as she mostly sleeps through now), dropping my lunchtime pump. In the last 10 days or so (coinciding with a bad cold) I've seen a pretty big drop in what I've been pumping. I've never responded to the pump all that well and even with 3 sessions (25-35 minutes long each) I was only getting about 10-11 oz which is enough for 2 bottles. When I dropped that first session I was still getting around 8-9 oz total for the day. Now I'm down to being lucky if I get 6 oz a day. I have been taking fenugreek the last several days and have been trying to up my water intake. I feel that generally my supply is ok - baby girl isn't fussy at the breast, seems very content when she's done nursing and hasn't been wanting to nurse a bunch more than usual on the weekends (when she's ebf). Does anyone have any suggestions? Do I need to be thinking about replacing my pump parts or anything like that? Thanks a bunch!