hmm. Well remember that pumping is not an indication of actual supply. Your pump could be in need of repair and not sucking enough, for one. He *could*simply not need as much and your supply is responding.
Wait, didn't you start working out more recently?
I was taking fenugreek anyway but my response to dips was to error on the side of cautions and I did something like add a pumping session somewhere - even if it was just on the weekends - to keep it going and at least stock up on the fridge or freezer stash since I didn't know where the dip could be headed.