I would say that it is not PVF as this affects regular days not just during/after exercise, but I'm no expert other than my own personal experience.
If you have a read of some of the forums on this site http://www.postviralfatigue.me.uk/forum/messages.aspx?TopicID=987 you will see how it affects the person.
I hope you find out what the problem is and wish you a speedy recovery.
Best Wishes.
Do you think this is really going to work?
It reminds me of the plastic things that people used to hang from the back of the car. What it does not what it looks like.
Defer to next year.
You CANNOT give your places away.