Hello @Tracy58 and welcome to the forum, we have all been through what you are going through 
You are one of a several newbies who have just recently joined us, a few I’ve just replied to today similar to your own.
And I’ll say the same to you as I did them, its brain fatigue! Just key the word “fatigue” into the search box above 
and you’ll find many posts on the subject. Your brain is currently repairing all the damage done that it can, from your stroke, so don’t even bother trying to multitask, in self preservation your brain will shut you down with fatigue.