Hello, I was smoking for about 13 years, but with  great efforts I quit smoking since about 15 months, I experienced a variety of withdrawal symptoms which are a mix of physical and psychological issues, i got rid from all symptoms except one, difficulty breathing, chest tightness, I read much from scientific websites and others experiences but I didn't imagine that such problem may stay still to this limit. I did x rays..CT scans with contrast ( cardiac, chest, abdomen) labs but without significant findings.

I need an explanation please.

And I would like to apologise because I'm not fluent in English, it's not my mother tongue.

Thank you

Ahmad