Too much milk!

My babe has slept through the night the past few nights, and she’s also starting to eat more solids, and is drinking less milk. I just have way too much milk and am feeling so full all the time, and like she never actually empties all the milk when eating. What can I do? I’ve frequently been using a haaka to get a bit of relief but was hesitant about pumping because I was unsure if that would mess up the supply/demand.