Hi all.I have a question that I hope u kind peeps can help with before I see my doc for the past couple of days I have been feeling drained. Exhausted so much so I have been going to bed really early. Then yesterday I had the worst headache ever. So of to bed at 7.30 without eating anything. Then when I woke up this morning I had a pain on the right side of my back which is worse when I cough. Could this be a lung issue? I have mild/moderate copd and should I be getting seen right away to stop this getting worse ?