Pain near middle left back near shoulder blade but more towards the middle. Not constant. But it is a stabbing pain?

Get screening. You definitely need to make sure all your screening diagnostic tests are upto date and negative. Thereafter consider a vacation, and a message. Placing something from freezer in a thin towel and placing on area will help. Maybe and I believe it is most likely muscle spasm from stress. But again, make sure you don't ignore the first line above. Taking an anti-inflammatory if you have good Kidneys 2.
REFERRED PAIN. USUALLY>NECK PAIN FROM AN ARTHRITIC JOINT WITH OR W/O TENSION RADIATES THERE. USE NSAIDS, RELAX AND DO THE ISOMETRIC NEXERCISES DESCRIBED IN MY BOOK, STOP YOUR NECK PAIN AND HEADACHE NOW.