Agree with the answer by my ENT colleague.
From the perspective of the cardiologist, while it is unlikely that an active 17 year old who was able to carry out physical activities with no limitation until recently will have significant heart conditions, it is not entirely unknown.
If there is a heart condition, however, symptoms are longstanding and are usually present from birth. Other symptoms like palpitations and dizziness can accompany the breathlessness though chest pain is not common. Simple tests such as ECG and Echocardiography can be useful.
The fact that you have been using nasacort for a sensitive nose recently points towards nasal or airway issues as the more likely cause. Of course, general medical conditions such as anaemia etc have to be ruled out as well.
Your family physician who knows your medical history maybe the best person to guide you as a thorough history and examination are necessary to ensure the right diagnosis is reached.
Hope your issues are resolved at the earliest. Wishing you good health!
Regards
Dr Nandakumar
