Angina Support Group
Angina pectoris is chest pain due to ischemia (a lack of blood and hence oxygen supply) to the heart muscle, generally due to obstruction or spasm of the coronary arteries (the heart's blood vessels). Coronary artery disease, the main cause of angina, is due to atherosclerosis of the cardiac arteries.
Driving me mad!
Angina is what I lovingly refer to as a heart fart. It's basically a spasm in the heart muscle or valve and causes pain in the chest area which usually dissipates in 15 minutes, longer and it may be an MI (Heart Attack)
Sadly there are other things that mimic Angina and can confuse you. I know from experience that GERD (Gastro Esophogeal Reflux Disease) is one that I really cannot tell apart from Heart issues.
So how do you tell the difference? Well the only method I found was to take a nitroglycerin tablet sublingual (under the tongue) if after taking no more than 3 nitro tablets separated by 5 minutes each the pain does not subside then it's something else.
Now to you specifically. All I can say is ask the doctor why he/she does not believe this to be classic Angina. It's not enough for them to just make a statement that it's not Angina, make them explain how they can tell that.
Good luck to you.