its tricky isn't it?. A relatively short term option might be to ask your doctor if you could consider trying Optifast (?available where you live?) diet Meal Replacements shakes (choc, coffee and strawberry taste good) between now and your appointment. This should shift weight quickly and get body into ketosis, which helps curb your appetite. Fill up on Miso Soup etc in between if too hungry. Really tough for the first 5 days but then you get used to it. This is sometimes recommended pre-surgery (was for me) to reduce abdominal fat in any event.
I am stilll using it as part of my diet now in liquid phase post surgery-I'm now post operative-8 days.