Hi kristina, Thanks for visiting HCM. Chest pain may have different cause, it can be simple musculoskeletal, may be due to acute pleuritis, pneumonia, pulmonary infarction,or since it is lower down in the chest, may be due to some abdominal problem. I advise you to go for chest x-ray and if it suggests something, treatment will be according to the diagnosis. If it is inconclusive go for a CT scan thorax to come to a precise diagnosis. The dreaded disease can be pulmonary embolism which must be ruled out at this juncture. If you are running down fever , go for complete blood count and sputum examination. Meet your doctor with the above reports ... Best wishes