Thanks for your question on Health Care Magic.
I can understand your situation and problem.
Possibility of
musculoskeletal pain is more.
At your age of 14 years, heart diseases are uncommon but valvular heart diseases can be seen at your age and can cause similar kind of dull chest wall pain.
So better to first get done ecg and 2d echo.
If both are normal then no need to worry for valvular heart diseases.
Musculoskeletal pain is more likely in your case.
So avoid
stress and tension. Avoid movements causing pain.
Avoid bad postures in sleep. Avoid heavyweight lifting and strenuous exercise.
Take painkiller and
muscle relaxant drugs.
Apply warm water pad on affected areas.
Don't worry, you will be alright.
Hope I have solved your query.
Wish you good health. Thanks.