LM, what an unusual post! I commend you for not going forward in light of your doubts, and Dr. Shapiro for recognizing that you were not ready.
I, too, walked away from surgery just before it was scheduled. My story was quite different, though. I was going to Bosley in NYC! For me, it was the combination of bad vibes and visions of a horrible "showcase" rep I had seen the day prior (whose work looked like a bad hairpiece) that caused me to rethink things just before I left home that almost-fateful morning, and left me searching the net. Fortunately, the first site that came up was this one, where a quick search on Bosley revealed that I was about to make the biggest mistake of my life.
The one thing we may have had in common, however, may have been our unreadiness. Clearly, you were in the office of one of the greats (unlike my situation). However, perhaps you need more time to consider the various aspects of the surgery, whether it's pain, growth, shockloss, etc. (and I'm not referring to looking beyond Dr. Shapiro, as it doesn't get much better).
My point is: Pat yourself on the back for having the insight and fortitude to say "something doesn't feel right and I'm not doing it." I hope you keep reading and asking questions, and ultimately make a decision that brings you happiness when you are good and ready. Bravo!