You won't...I was told it's not uncommon to gain a little after the swelling of the surgery goes down. When you get your first fill, you will be swollen a little at first after that, and it will cause restriction for awhile--which will help you lose weight. After awhile, when you hit another wall, you may need to go in for another fill (like I'm doing tomorrow for my 2nd fill)...It'll be okay! Remember...plateaus, like you know what else, DO happen..it's your body's natural response to the 'starvation' pre/post surgery...I went through it too.