For the past five years I've been suffering from chest problems, which originally started with a particularly bad chest cold which took a month to go away.
I constantly feel as if I'm on the brink of getting a chest cold. When I exercise hard it often brings on a chest cold which affects me for a week or more, whereby I cough up yellow mucus and I normally get a sore throat too. As it's going away I often get itching in my lungs, right in the middle. My wind pipe feels raw, as do my lungs.
When running I often find it difficult to breath, especially in hot weather.
Cold weather or dampness also often brings on a chest cold and I find myself feeling hot and fatigued quite often.
I am not a smoker, though both my parents smoked in the family home as I was growing up.
One last point, which might sound a bit strange, but just before the issues began I shared a flat with a friend and there were these fungal / mushroom type growths which constantly appeared from under the bath. My friend has also had persistent chest problems since staying in that flat.