Re: 14 week old - super fussy, super sleepy, super hungry...
You are right- you just can't overfeed a breastfed baby. It's very normal for babies to change their nursing and napping patterns in response to a growth spurt (they can happen at any time!), a need for more milk (baby nurses more means mom makes more), or teething (yes, it can start this early!), or development. So I don't think you need to worry a whole huge amount unless your LO starts running a fever or seems really uncomfortable. If that happens, I'd go to the doc and have the doc check his ears and throat.
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!"