I was diagnosed with glandular fever when I was 29. I had had cold after cold and sore throats and I guess it all culminated into a flu type illness. After feeling exhausted and swaeting for a week I went to my GP who diagnosed the 'fever!' I have to say a diagnosis meant I could actually allow myself to be ill and not come into work. I spent two weeks at my parents with the most painful sore throat I have ever exeprienced that it just made me cry and want to tear my head off and all I did was sleep. Looking back it was a bit of a blur but probabyl because all I did was sleep! It was incredibly depressing to not be able to do things that you ususally do. Even having a bath would tire me out. I went nack to work parttime 2 months later. I wouldn;t say that I still felt 'ill'but I was acutely aware that my tolerance for energy was not there. I nall it took 8 months to be able to go out in the evening without feeling so tired I was uncomfortable. Having said that, I manged to go to India and travel and drink. My advice is to pace yourself and the more you worry, the worse it gets. My downfall was trying to do too much too soon. You will be tired and low and pasisve and quiet for a fair few months...it completely knocks you out...but roll with it and you will gradually come back to life. 18months later I am back to normal..I would say the only thing that maybe stays with me a bit is my tolerance when I am tired. When I get overtired I really feel it to the point where it's uncomfortable and I can't sit still. However, a normal perosn would get that from time to time so I am lucky. I made sure when I was ill that I ate healthly and didn't rush back to exercise and took things at my own pace.
It sucks being ill and this illness can really take it out of you but at least now I am grateful to feel normal again!