Wow, with all that water and exercise you should certainly do well with the weight loss!
The hardest part may well be avoiding all the carbs over the Christmas Party/ New Year Season!
I'm planning my Christmas day feast to include LOTS of protein, especially seafood, so I am sooooooooo full I won't want to eat all the carb stuff.
I have a great recipe for LC Ice-cream but you need an ice-cream maker. but that really helps on hot days when the rest of my family is hoeing into cool, high carb treats.

I have been to heaps of Christmas parties through work and the ONLY way I survived was to take diet coke and my own platter of low carb treats.
keep going ,selina.
You can do it,
See ya ,
kezza