Soy and/or oyster sauce can do that to weight when you use it in the evenings, but chances are it's the salt...
Well done Kaye on reaching your goal - and, as you say, you'll know what to do when you get back. You've been really strict with your diet which is why you got there so comparatively quickly. (Note to self: be stricter, get weight lost, end diet. hmm...)
Have a lovely holiday
x