I know what you mean as well. Can't explain it (get more tired from trying), people actually seeing you doesn't help either because visuals don't help.

First hand experience would help ... but ... wouldn't wish that experience on anyone.

So... shrug it off (when you get the energy to do that (and remember to do that) ... and just do what you can do; when you can do it.

Wishing you well!

Niko