I recently been having pain from my left shoulder blade running down to my left arm especially tricep region with slight chest pressure. im taking nexium for gerd but i keep having this pain off and on no shortness of breath and my heart rate is 72. i

Gerd: This doesn't sound like a gerd symptom, but seems to be musculoskeletal or possibly related to a nerve impingement from a spur or a disc pressing on a nerve root. An orthopedic surgeon or a neurologist would be best qualified to evaluate you and order any appropriate tests and treatment.

Chest pressure: Do you have the following risk factors: 1. smoking 2. Diabetes 3. Hypertension (high blood pressure) 4. High cholesterol 5. Family history of heart attacks (coronary artery disease)?