By no means am I any expert here BUT I would say forget about it and move on! Stay OFF the scale until you absolutely HAVE to get on one (in the dr's office) and do your best from here on out.
Are those 5 shakes Protein shakes? If so, are getting the correct amount of Protein in each one?
My pre-op diet requires at LEAST 60 grams of protein per day.
Interesting that they DEMAND that you lose 20 pounds in just 2 weeks~ if you could do that, why would you need surgery in the first place?