Percy's doing what he can, but that sick feeling is (weirdly enough) getting stronger rather than fading away. He hasn't really thought about how nearly drowning would effect him before now, a mixture of avoidance and a belief that it wouldn't really be relevant again.

He's a demigod. He should have known better. "You don't want to be my Lady?" he asks Annabeth, his tone a mockery of hurt feelings to hide his actual discomfort. He tries to focus harder on the water part of what he's doing , moving the sewage around as they turn left. "Darker, right, of course. Are we like, actively looking for danger right now because we don't have anything better to do?"

It comes out a little harsher than he means it to, and he winces. "Sorry. Left is good, lead on."