I've had s disc extrusion at c3-c/4 that was small in2012 and large indenting cord in 2014 with severe stenosis chances it will heal without surgery?

Ask to see the image. I suggest you ask the surgeon to show you the old and new images so that you can see the "obvious" difference between the old and new images. If the disc is indeed compressing your cord and you have cord compression symptoms (numbness, weakness, unsteadiness, bowel/bladder symptoms, etc) then you will need surgery. Many times the read on the MRI is exaggerated and it is important to compare pics.