I've been poorly for a couple of months, 3 weeks ago went to the doctors and last week he diagnosed me with glandular fever, I have been suffering lots with aches and pain epecially in my eyes, back of my neck and upper back and rob area, am getting better now and these symptons are not as bad as they were but have since started with the backs of my knees they have started to really ache, is this part of the post viral fatigue??