11wk PP supply drop?

My LO is a big eater and eats anywhere from 32-40oz a day. I’ve had no problem keeping up with this until the past few days. My supply just seems to be randomly dropping.

I thought my supply had already regulated because my output was remaining consistent even though I dropped to 5-6ppd a few weeks ago (I keep a log).

Has anyone else experienced this? Was I wrong and my supply hadn’t yet regulated, so I’m seeing it now? Do I just need to start pumping more again?