Hi. I can understand your concern.
Chronic cough is commonly seen in bronchitis and
lung infection. Since your chest x ray is normal, no need to worry for lung infection.
Possibility of bronchitis is more in your case.
So better to
consult pulmonologist and get done clinical examination of respiratory system and PFT (Pulmonary Function Test).
PFT is needed for the diagnosis of bronchitis.
It will also tell you about severity of the disease and treatment of bronchitis is based on severity only.
You may need inhaled bronchodilators and inhaled corticosteroid (ICS)
Possibility of
musculoskeletal pain is also there.
Ibuprofen is anti inflammatory.
You will definitely improve with combination of painkiller and
muscle relaxant drugs.
Also apply warm water pad on affected areas.
Avoid movements causing pain.
Don't worry, you will be alright in 1-2 weeks.
Hope I have solved your query.
Wish you good health. Thanks.