I am 41 and have realised that over the past two years, my health has gradually declined.
For example I now get every cold going, and am laid low again with a chesty - but mainly totally draining - virus.
I feel like I'm a few weeks pregnant - totally out of sorts, often nauseous, knackered - but I feel like that all the time now 
I eat well, am slightly overweight but not much, I don't exercise madly or anything but have always had a basic level of fitness, I don't drink loads and nothing major has changed.
Is this just a symptom of ageing?