I went to the er for chest pain which started with what i thought was a calf sprain. they did ct scan to rule out blood clot, so is it a sprain?

Possible thrombosis: Although it is not too common in younger people, it is possible to develop a blood clot in the veins of the legs. This venous thrombosis could then break off and lodge in the lungs causing a pulmonary embolism. The best way to assess for this is a ct scan of the chest. The way to check for a blood clot in the legs is an ultrasound exam. If these are both negative you might just have a sprain.

Blood clot maybe: It could be a blood clot.

Have it evaluated: A person with chest pain needs to be evaluated and treated appropriately. Multiple possible causes may be: heart attack, esophageal reflux, anxiety, musculoskeletal, pneumonia, pulmonary embolus, and aortic dissection. Have it evaluated right away to prevent potential serious complications.