I've been experiencing severe and sudden pain in upper left shoulder for the past 2/3 days. Along with my bp elevating even though I've had my meds. I went to my GP and had a ECG/EKG and my results were abnormal. Doctor prescribed pain relievers & muscle relaxers but haven't made a difference. I'm beginning to thinkni maybe experiencing a heart attack. Could it be that a 30+ can get a heart attack without the crushing chest feeling????