One might. And its not inconsistent with the sentence. There could be several days of disorientation prior to being able to form the memory that they had a stroke a few days ago.

Tangentially related, https://www.ted.com/talks/jill_bolte_taylor_s_powerful_strok... is about a brain scientist who had a massive stroke and she talks of both the shutting down of the brain along with the starting it up again.