I have occasional pain generally located between my chest and upper abdomen that worsens upon inhalation. i also have periods of tachycardia. plan?

Many causes: The 3 principal causes of your pain are: pleurisy, pericarditis and myofascial syndrome (chest wall, rib, nerve, and arthritis pain). A chest xray, echo, erythrocyte sedimentation rate, and physical examination can sort this out. The cornerstone of therapy is first an accurate diagnosis. Good luck!

See GP : There can be various causes for this starting from reflux to heart problems like arrhythmia. Need further history and examination to form a diagnosis. Please consult your GP .