Re: Schedule, pumping, and feeding, oh my!
It's really tough to say whether or not you can safely replace that nighttime nursing session with a bottle if you're not going to pump. I honestly think it's risky, and that while you may not come up short on milk immediately, in the long run you're likely to start falling behind. There's no way to know, of course- but my gut feeling is that the safest, surest course of action is always to nurse.
One thing to consider is that at just 9 weeks, 5-6 hours of consecutive sleep counts as sleeping through the night. It's something many babies do not do until they are significantly older than yours, and many babies start waking more frequently as time goes on and teeth start coming in. So I would not count on a 7 hour sleep stretch anytime soon, certainly not in a mere 3 weeks' time.
Is baby sleeping with you, or is he down the hall in a crib? Often the key to better night's is to take baby to bed with you. It's a lot less disturbing to your sleep to roll over and flip out a breast than to get up, trudge down the hall, nurse, put baby back in bed, trudge back, etc.
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!"