And, being sensitive, you will develop
chronic lung disease with progressive destruction of your
lungs, most likely at an early age.
Having trouble so early in life suggests that you may have an inherited condition called, alpha-1 antitrypsin deficiency. This can be diagnosed by a simple blood test. Check on this with your doctor.
You must do everything you can to give-up smoking, forever, and start trying now, if you want to preserve the lungs you have at this time.