Geoff was anxious as he had been having trouble with his balance for some weeks (probably several months, once he stopped to think about it). He felt unsteady on the stairs and was even sometimes wobbling when he was standing still, which he hadn’t experienced before.
While this was concerning to Geoff, he wasn’t sure that it warranted a doctor’s appointment. He thought the symptoms would probably pass in another week or two. In the meantime, he didn’t want to waste his doctor’s time.