Yesterday, 07:27 PM
Pump output is a imperfect indicator of supply, unfortunately. Pumps extract milk with very different mechanics than babies nurse with, and an efficiently nursing baby will almost always be more 'effective' than even a really good pump. If you are pumping to replace a nursing session, I would say that it is equally about signaling to your body that 'hey, there's still a baby here, there is still a need for this milk,' than simply getting the milk to put in the bottle. That said, and I hear that there are some other pieces to this puzzle, if you are wanting to move toward exclusively nursing, at the breast, if you can nurse with a latch that is comfortable, and you are around, it might be best to just nurse, nurse, nurse, as much as baby wants to and is willing to nurse.
Here is my favorite quote about spit-up, from Dr. Jack Newman: https://www.facebook.com/DrJackNewman/posts/263523610465359
There are more parts to your post, but I'll have to return.