what is the significance of disk bulges at C4/c5, c5/c6, and c6/c7 (3-4 mm) and L3/4 and L4/L5 (3-4 mm). Is that considered moderate, mild, or severe? I'm 45 y/o female, 5'10", 165 lbs, otherwise in very good shape. the mri showed no signs of "degenerative changes"