Re: 4 month old... nursing much less...
great advice from Jenna. Are you running short on milk to put in your LO's bottles while you work? I agree that 16 oz per day is still terrific output, but if you're running short adding in another pump session- maybe after your baby goes to bed at night, maybe during the workday, maybe first thing in the morning after he nurses- would be a good way to boost supply and cut out that doubt in your mind that's making you eye those cans of formula!
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"