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Hello! My name is Dr.Ehtisham. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply momentarily.
So you had shingles in the past and now have these symptoms?
Thanks for the details
This is unlikely to be related to shingles
Since you have been examined by respiratory physician and all the tests are fine so it is unlikely to be anything serious
It can be a functional problem related to stress or anxiety
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