Congrats! Im almost 24 weeks and had to get all my fluid out at 16 weeks. I have not gained any weight at all I've actually lost about 18 lbs but I've also been sick with nausea, kidney stones, and I had my gallbladder removed at 18 weeks. I was told as you get bigger things inside swell and makes the lapband tighter so if you're in the green the basically you will be pushed to red. I had my lapband April 2013 and got pregnant in December 2014 :-) getting the fluid out I thought was going to be awful and I would gain 50 in the first month lol but it wasn't the case. Maybe you won't gain because you will be conscious of your fluid not being in and what you put in your mouth.