Congratulations!
I'm also pregnant, but I went and had a total unfill two days ago. Of course, I didn't want to, but I was experiencing 'morning sickness' all day, and was gagging and unable to vomit. Once the morning sickness passes, I can get fills during pregnancy (if I want) with a letter from my OBGYN. I haven't been any more hungry than I was with my band filled, which I feel suprised about.
What is important to remember is to put your band first, if you are experiencing any gagging or vomiting. There are some pretty scary stories on this board about having slipped bands during pregnancy. Even the thought of having to have surgery again was motivation enough for me!
If your not sick and you can get adequate nutrition, just keep trucking along