6.5 weeks pp and supply in one side dropping?

I’ve been EP since day 4 and I’ve pretty much just been making just enough for her (950ML). She on average was taking in 900 ML a day. I was slowly starting to build up a stash but it’s starting to dwindle since she’s had a few days where she’s had more like 1000-1100 ML. The last three days one of my breasts has stopped producing as much. It also had lumps that I could feel in it. It doesn’t hurt. I’ve tried massage, heat, cool, that one breast just doesn’t seem to want to produce anymore. Advice?