Had very slight dry cough and shoulder pain for 12 weeks. 3 chest xrays and bloods fine. respitory specialist not concerned about lung cancer worried?

No.: It would be very unlikely to be lung cancer given young age (35) and never-smoker. A chest ct is a better test at looking inside the lungs, but this is only needed if your lung specialist thinks so.

Not worried: Some respiratory illnesses take a while to resolve. Your doctor can guide you through this. Don't be too quick to assume you have cancer! remember, your doctor actually sees you - no one here does!