Pain by the shoulder blade is most commonly due to a spinal or rib misallignment at that level, a muscular problem in that area, or a combination of both. A chiropractor is the answer to either...
I recently had my gallbladder removed because I was having a fallbladder attack. When the operation was done, the pain in my right shoulder blade immediately disappeared along with pain in mt chest...
A heart attack can cause those symptoms. Assuming that this is not the case it would most likely be a pinched nerve in the neck or mid back or a rotator cuff problem among other things. See you doc.