The best advice, Mr Kite, is stop wondering and go get yourself and your heart checked in emergency.
And let us know what's going on.
Hi Mr Kite
I can understand your concern regarding these symptoms. What you have described certainly is not one of the classic presentations of an MI, but that said, you probably know that many people do not demonstrate the classic symptoms. That is of course, why no one should ever tell you, ahhh nothing to worry about.
As you described the symptoms though, I couldn't help but think you have described many of the symptoms associated with Thoracic Outlet Syndrome. This is a condition I've seen quite a bit of even though it's considered rather rare. Blood vessels and nerves pass through a narrow space between the armpit and shoulder and can become compressed. Often seems to become somewhat of a chronic condition. People complain of pain in the neck/ shoulder and numbness and tingling of the 3rd-5th fingers and sometimes the forearm. Many times is accompanied by weakness in the grip and arm, but not always.
Of course it could be many other things, but your description brought that first to mind. You'll feel better if you get it checked out. At least have a check to rule out any cardiac problems. You never know, and that's not a good thing to ignore.
PLease go to the emergency or call an ambulance and get a proper diagnosis.I would think not knowing would only cause more stress.