Congrats on your pregnancy! I had a band baby back in 2011, and he is now a 30lbs, happy healthy 15 month old boy. I want to be honest with you, because I know that is what you're looking for as well as support, that type of weight gain this early on in your pregnancy is a little much. The time where you should be gaining more weight is at the end of your 2nd trimester beginning your 3rd. I had to have most of my Fluid removed around the same time you did in my pregnancy, because I felt "stuck" every time I ate and I ended up losing 10lbs in my 1st trimester. After my band was loosened I started eating more until I found I had gained back 52lbs.
There is nothing wrong with fulfilling your cravings, but do it in the same manner you would with your band. And if you excercsie regularly now, you can keep it up! I do want to say that its great that you did identify that you felt something was wrong with your band and how you felt, I do know a few people who didnt and really ended up making themselves quite sick for half of their pregnancies.
Good luck to you and I wish you a happy, healthy pregnancy!!!