Ive been having an aching pain & occasional sharp pain in upper back, sometimes traveling to shoulders or down my back. i think its my muscles, but im not sure, worse when leaning forward? what could cause this, and what can i do to it get better?

The upper back pain you describe could be caused by a number of medical problems, including, but not limited to muscle issues, cardiovascular problems and spinal issues. A team approach, including a cardiologist and an orthopedic surgeon could assess your symptoms with targeted tests including imaging (chest and spine X-rays) as well as a careful history and physical exam.