A "prominent right hilar shadow" on a plain X-ray is a non-specific finding - it can simply be a normal or prominent pulmonary vessel or a technical/positional effect, but it can also mean enlarged lymph nodes from tuberculosis, sarcoidosis or infection. Given your dry cough with intermittent breathlessness and chest heaviness for 1 to 1.5 years, this needs proper evaluation rather than reassurance from an image alone; it is not an emergency, but it should not be ignored either. with breathlessness and chest heaviness does need proper evaluation rather than reassurance from an X-ray alone, and asthma or allergic airway disease, post-nasal drip and acid reflux are common treatable causes at your age.
Next Steps
Please see a pulmonologist or physician in person with the actual X-ray film. The usual next steps are a CECT chest (which settles whether the hilum is truly abnormal), spirometry with reversibility to check for asthma, a CBC with ESR, and TB testing including sputum if indicated. Long-standing dry cough with breathlessness is often asthma or allergic airway disease, which is very treatable once confirmed. Seek prompt care for coughing blood, unexplained weight loss, evening fevers or worsening breathlessness. I would be glad to review your films on a Practo consult or at Synergy Multispeciality Hospital, Miraj.
Health Tips
Seek prompt medical attention if you cough up blood, run a fever with night sweats, lose weight, or the breathlessness becomes severe or occurs at rest.