<s>[INST] When stretching my back the other day, I felt a sharp pain between my shoulder blades followed by so much pressure, I couldnt yake a breath to speak. The pain is concentrated between my spine and right shoulder blade. The pain worsens when standing or sitting for too long, or deep breaths. [/INST] Hello! Welcome on Chat Doctor! I carefully read your question and would explain that your symptoms are related to a musculoskeletal pain from overstretching. Coming to this point, I would recommend having some rest and taking some painkillers (acetaminophen, ibuprofen, fetoprotein, etc.). A muscle relaxant (Flexeril) would also be helpful, coupled with a good massage of this region to relive the muscle spasm. Hope to have been helpful! Kind regards,  </s>