I'm a 36 year old female and I had the first of four heart attacks at 32 years old and three months ago had 7 stents placed in my heart. I did not have the "common symptoms" listed for heart attack. Men and women have different symptoms and also each person is different. Some signs and symptoms are similar but not identical. I had pain in my face, neck and between shoulder blades along with shortness of breath on the first heart attack. The second one was pressure in the front-dead center of my chest that radiated into the right shoulder and pain in neck. The third one I had nausea, light headed, severe pain in left arm & shoulder and between shoulder blades, dull pain in right arm & shoulder, tightness in chest, and my jaw ached. The fourth one was severe pain in left shoulder and arm pit & center of chest and between shoulder blades with shortness of breath. All four times cardiac enzymes or the ekg determined heart attack and I was placed in hospital for 3 to 7 days. SO.....your right shoulder pain could indicate a heart attack but that is up to your Doctor to determine. I would get it checked out. My cardiologist said not every two people are alike and females will also experience different pains than males will.
For several long painful months before I had to get the 7 stents I have now...I had severe shoulder pain only, it started in the left side and them spread to the right and I assumed that it was a pulled muscle since it would act up when I would walk, climb stairs or other activity. I had a series of xrays and even seen a orthopedic doctor and nothing was found to be wrong. Since my stents I have not had that first shoulder pain while doing those activities and while speaking with my Cardiologist he said each time it hurt was another indication of a heart attack and that my family doc and Ortho doc should have caught on to it. So be safe and get it checked out. I am lucky to still be here today, my right coronary artery was almost dead and it was close to being beyond repair.