Diana,
Be sure to do something good for yourself everyday. Call a friend, get your nails done, eat something you love and usually avoid. Make a game of fighting out what seemingly little thing you can do to raise your spirits or make you smile. Continue this before and after surgery so you bow you are taking care of your body and your soul. Self-healing will help keep you moving forward with more of a sense of control and spiritual well-being.
I wish you all the best.