I've got it aswell!
It started late Feb, I had a week off early on and I did start to feel better and so went back to work but towards the end of the working week I started to feel crap again.
I've been off 3 separate weeks in total, each time I was starting to feel better and so went back to work only to feel unwell again. I decided to stay off now until I get over it.
Went to see the Doctor again last week, he said if you do too much it can put back your recovery time.
I asked how long it would last, he said how long is a piece of string!
I'm self-employed so don't get sick pay, I got the forms to claim Incapacity Benefit. Filling these forms in is even worse than having the Glandular Fever! :thumbdown