When I eat or swallow I have pain inbetween my shoulder blades like stabbing pain?

Visit your doctor. A number of things could be going on. You could have esophageal spasm, esophageal stricture (narrowing), atypical reflux symptoms, pancreatitis, or an ulcer in your stomach or duodenum. You should visit with your doctor to further investigate.
Shoulder blade pain. It seems concering. It may be stomach ulcer, related to heart or aortic dissection. Needs further evaluation.