Sports if you are asthmatic and lack of inhaler can turn out to be a dangerous affair. Asthma is a disease that can cause breathing difficulties, coughing, and compactness of the chest among other things. Physical activities can provoke an asthma attack. In your situation, it would be dangerous to do track and field without an inhaler. Warn your parents or school nurse about your asthma and request them to help you get an inhaler before beginning track and field. 

The problem you've got could be a respiratory infection. Coughing up blood or hemoptysis is when your blood vessels in the airways are irritated thus, the blood is released. Rest. Drink. Fluids. A hard no for smoking and polluted air. You can also use a humidifier, it will moisturize your throat and alleviate your cough. Nevertheless, in case the symptoms persist, or get worse, you are to consult a doctor for a proper evaluation and treatment.

These symptoms often happe­n when you have a virus infection. Lotide­ cough syrup can help your throat feel be­tter and stop coughing so much. Prednisolone me­dicine is a steroid that can reduce­ swelling in your throat.

Your chest hurts ne­ar the heart area. Many cause­s exist: heartburn, muscle strain, anxie­ty. Observe other symptoms like­ breathing issues or sweating. Se­vere or recurring pain warrants me­dical attention. Ignoring it risks danger. Doctors can evaluate­ safely.