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The breathing problem could be related to your anxiety
which can contribute to all symptoms but this could not be the only cause. It would be wise to follow what ever advice was offered in such a situation to make you feel better. You need to stop smoking
as it can cause severe problems other than COPD
. Prevent hyperventilating which can make you dizzy and faint. Get on the oxygen
for some relief. You need to be on proper treatment for your anxiety dear, from your Pshychiatrist. It is of utmost importance.