It has been seven years, after the birth of my last son, that I have had these symptoms. The first time, they lasted 6 months, but then subsided. Now I get my "mystery illness" anywhere from 12 hours to 7 days at a time, then I feel normal again. The symptoms are as follows: sinus headache, post nasal drip, eyes ache, chills (wear sweatshirts when others wear shorts), achey muscles, tired but sleep does not help.
I have seen many family doctors, had blood tests, thyroid nuc med test, biopsy and nothing. I have had doctors test for autoammunine diseases, but nothing. Three doctors even said, I have no idea what the problem is, and just throw up their hands.
So to see it could be CFS would help a little, but I don't have a doctor I trust, where would I find a good doc who could help a little.