Thanks for your question on Health Care Magic.
I can understand your concern.
You are having COPD,
acid reflux and not taking any treatment, so possibility of
chest pain due to worsening acid reflux or
lung infection is more.
Lung infection is very common in COPD patients due to poor lung defense.
So better to
consult pulmonologist and get done clinical examination of respiratory system, chest x ray to rule out lung infection.
If your chest x ray is normal than no need to worry for lung infection.
You should start treatment for COPD and acid reflux.
Inhaled bronchodilators and inhaled corticosteroid are the treatment of choice for COPD.
Proton pump inhibitors and prokinetic drugs are needed for acid reflux.
Don't worry, start treatment and you will improve.
Hope I have solved your query.
Wish you good health. Thanks.