On two occasions recently I have discovered that when I speak (what sounds perfectly fine to me) is not at all clear to others. I guess my wife know what I say now.
Those that know me are not embarrassed and ask me to repeat. Those that don't know me don't know how to react. This is one reason I tend not to engage in casual chitchat. It is fine if I am understood, but just not worth the effort if I have to repeat myself. Writing is fine, whereas talking is far harder.
My stroke was September 2013, but poor speech is still one of my handicaps. I get exhausted very quickly which people just cannot understand.
What I find really frustrating is arguing a point. When I know something is not correct I find it very very difficult to get my point across.