He listened as she talked about the journal. Sure, at the moment he'd take it at face value - he'd just have to run some trials later to see what happened when he wrote something in it.
The Doctor didn't bother to really respond much to her ramblings about not being with Dean and such slide. She was just sort of shaken up, as her following bit proved.
"Someone else - Sam, right?" He didn't know who Sam was; but, he assumed that he seemed to be at least a little important to her. Watching her mannerisms, the apologetic smile and the furrowed brow that followed, the Doctor was fairly certain that she wasn't in fact okay. Though, if he had to guess, the first step to being OK was getting her and Sam and Dean out of this place.
"Do you know how many other people there are here?"