I have been diabetic 27 years. Weigh 175 pounds, 5'7". My cholesteroal is good and so are all my other tests. My concern is I have been having a sore/heavy feeling in my left breast/heart area. It occasionally radiates up into my neck. I'm concerned it may be something like a clogged artery, but I don't want to jump to conclusions. Any advise is appreciated.