<s>[INST] hi my name Whitney Im 16 years old my heart has been hurting for awhile I have back pain and my lungs hurt I coughed up blood once Im scared I never told any of this to my doctor but I want to know whats wrong with me do I have heart disease or am I gonna have a heart attack or do I have cancer whats wrong with me please help [/INST] Thanks for your question on Chat Doctor. I can understand your concern. First be relaxed and calm. At your age, cancer and heart disease are very, very less likely. You are having hemoptysis (blood in sputum). Common causes for this is lung infection (pneumonia) and bronchitis. So better to consult pulmonologist and get done clinical examination of respiratory system and chest x-ray. You may need antibiotics, painkiller and anti-inflammatory Chat Doctor.  Don't worry, you will be alright with all these. Avoid stress and tension, be relaxed and calm. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>