losing weight to make sure you don't gain weight isnt the best way to go - i think you would be wiser to spend the next 8 weeks trying to choose healthy choices (maybe try to ease out of HAVING to point everything) so you know what you can have, and can make wise choices when you go abroad.
where are you going on holiday? light cereal breakfasts, plenty of fruit for snacking (so cheap and delicious abroad usually) and of course if you're going to Europe, fish is readily available and cheap, and America you can get steak and salad and they're not like some of the English places - they'll do anything to help you so if you dont want sauces or dressings they will make sure you have it! x