I have had pain in the side of my neck that seemed to be muscular (massaging it would help- or would seem to relocate to my lower back after massage). I also take a nasal spray at night that seems to cause some acid reflux. I twice experienced some mild , yet sharp unusual left side back middle back pain earlier today when I moved a certain way that somehow seemed related to the acid reflux symptom. Tonight, I awakened with some slight clamminess in my legs that seems to have subsided and the acid reflux remains in spite of the fact that I did not use the nasal spray. Just in case of heart attack, I took 325 mg of aspirin. My blood pressure and pulse were high 117/110, resting 74 bpm (usually in mid-60 s). I m thinking the back pains may be due to anxiety - and the result of a cardio workout (interval training and light weights) I performed the day before. As I type this, only the slight acid refux remains. Should I be concerned about a heart attack?