Thanks Thefunbra, Chloe and SIB.
3 weeks ago I think I experienced it. I was very confused, forgetting simple things e.g. To say thanks to the teller, good morning or checking on someone's health even when I had known they are sick and sound sick while I am talking to them, was having difficulty finding the right words (which was the most frustrating) My mind would wander off, at times while driving. It was scary and very frustrating.
It lasted for 3-4 days. Luckily part of it was on a weekend and stayed home, rested, avoided any communication, just stayed close to SR.
I hope it does not happen again. But the good thing is if it happens again, now I know what is going on.
Thanks again.