Hi thanks for asking question in health care magic. You have choinergic urticaria.For that antihistaminic drug like cetrizine is helpful. Avoid spicy food and alcohol less, as they can aggravate the condition. While doing exercise do first light exercise and running.drink more water and fruit juice. If with cetrizine like drug not effective then leukotrien antagonist drug like monteleukast has to be taken. The chest pain may be muscular pain or as part of viral infection.simple analgesic taken.but if it is associated with fever and cough then chest x ray done to rule out early pneumonia or acute bronchitis like condition. I hope my suggestion will help you. Wish you good health