Hi Barb,
We all understand completely, so whine away. Sometimes just writing your feelings on paper or the monitor, in this case, helps let it all out. I usually punch a pillow. I get angry when people don't "get it". Even PWMS, if they don't have the same symptom can't understand how troublesome it is.
People think if you're tired, just rest for a minute or two, or sit down and it will rejuvenate us. If you're dizzy close your eyes and relax. NOT! No way will it help and they don't get it. When you're bone tired or dizzy you can stagger or fall.

It takes more than a few minutes to re-coup.
When I get fatigued, I must lay down, NOW. But hey, they think we look so good we must be just a little worn out. They have to walk in our shoes for a whole day and maybe they will get it, or not.
I hope you feel better. Years ago I had dizziness and it went away. I hope yours does too.