Thanks for your question on Health Care Magic.
I can understand your concern.
By your history and description possibility of
stress and
anxiety related breathing difficulty is more.
But at your age of 15 years
asthma can also cause similar symptoms. So we need to rule out asthma first before stamping anxiety as a cause.
So get done PFT (Pulmonary Function Test) to rule out asthma. If PFT is normal then no need to worry for asthma.
Stress and anxiety appear more in your case.
So better to
consult psychiatrist and get done counseling sessions, try to identify stressor in your life and start working on its solution. Sometimes only
counselling and discussion with psychiatrist are sufficient to relieve stress and anxiety.
You may need anxiolytic drugs too.
So avoid stress and tension. Be relax and calm. Don't worry, you will be alright.
Hope I have solved your query.
Wish you good health. Thanks.