Thanks for your question on Health Care Magic.
I can understand your concern.
COPD patients are more prone to
lung infection because of poor defense.
And your symptoms are more suggestive of lung Infection.
White cells in the blood are marker of infection.
So treating doctor also wants to rule out infection.
In my opinion, you should also get done chest
x ray first the confirmation of lung Infection.
If chest x ray is showing consolidation or infiltration than you may need antibiotics also.
So get done chest x ray also.
Hope I have solved your query.
I will be happy to help you further.
Wish you good health. Thanks.