I am posting this in the hope that it may save someone from the consequences of a stroke. It's a salutary tale.
This was related to me by an elderly man I know (80) who's extremely astute and well-informed, an ex-journo, and whose memory and recall are better than most people half his age.
He was in a shop and said he felt 'slightly unwell' but didn't put it down to anything serious. He went to complete his purchases and had forgotten his credit card PIN, something that had never happened to him before. He thought he might have had a mild stroke and got a taxi to a nearby hospital, where he was taken in and found that he had indeed had a minor stroke. He was treated and discharged, given meds, and is now fine, but was told that had it not been for his quick action and self-diagnosis, the effects could have been serious.