Thanks for your question on Health Care Magic. I can understand your concern. Coughing out blood, weakness etc can be seen in lung cancer. But at your age possibility of lung Infection is more than lung cancer. So better to get done chest x ray. Chest x ray will tell you about lung cancer and infection both. About baldness and loosing hair, hyperthyroidism can be the cause at your age. So get done thyroid function test to rule out this. So no need to worry much for cancer but you need above mentioned investigations for the treatment. Hope I have solved your query. Wish you good health. Thanks.