I have a sharp pain in my upper right back under my shoulder blade when I take a deep breath, yawn, sneeze, or perform certain physical movements.  The pain can also sometimes be felt under my right ribs.  It depends upon my posture.  I believe I had this once before but remember the pain going away in just a few days.  Its now day nine of this.  I have seen a doctor.  She ordered a lung x-ray, normal and blood tests to test for a clot, normal.  Im telling myself that this is muscular, as the pain is related to movements, whether heavy breathing or physical changes in posture.  Am I making the correct assumption?  The pain responds moderately well to Ibuprofen.
Hi, Welcome to Chat Doctor forum.  It appears to be the muscle twitch, may be due to the deficiency of calcium. The other reason is the gastric hyper acidity due to the irritant foods, peptic ulcer, or secondary to the liver problem or gall stones.  I advise you to consult a physician for diagnosis and treatment, you may need to have an M.R.I. for diagnosis, besides other tests.  Take more of green leafy vegetables, pulses, sprouts, and protein rich foods, to have good health resistance against the infections.  Wishing for a quick and complete recovery. Thank you.