To drop or not to drop night session.

My baby is 5 months and sleeping through the night but I still wake up at night to pump. I’m just barely keeping up with her and worried if I drop that session I may not have enough. Any advice? Did your supply drop?

I typically produce an ounce an hour so if I go 3 hours between pumps I get 3 ounces. 4 hours, 4 ounces.