I would think that a stroke would affect her speech and motor coordination continuously and grossly. Not just "lay down for a few minutes and everything's fine". For instance, a stroke victim would not be giving a press conference this afternoon, at least not without a readily observable affect.
That's why I wondered if PD had some of the symptoms of a stroke. My (limited) understanding is that symptoms come and go depending on the severity, and also they can be covered up temporarily.
It seems like something neurological, for sure. I agree that it’s too off and on to look like a stroke. It seems like something that strikes with a ‘brain storm’ at certain times. Maybe Parkinsons can be like that in the early stages, I don’t know. It could be that Parkinsons disease is more variable than I know, too. I’m not an expert.