Have just had a call from my doctor regarding the chest x ray I had last week.its shown some signs of shadowing in the lungs so I have to wait for a call now from someone telling me to go for a cat scan in the next 2 weeks , I asked him what it was and he was reluctant to say untill had the scan but indicated it may be a touch of pulmonary fibrosis !!!!! Can anyone give me any info on this? Also would this affect anything different to what copd would,also feeling very light headed last few days,is it all connected ?? And what about vitimim d,would that help.????