pregnancy and lap band

Hello. I had lap band surgery about 2 years ago. Tuesday I found out that I am pregnant. I am kinda worried about my diet related to my band and my baby. I feel very selfish because I DONT want to gain my weight back. I know some weight gain is normal and necessary but I have had 3 children and I have gained 50-60# with each one. I have only .75cc in my band I think that I would be ok but I dont know. Anyone out there that has been pregnant with their band??? What did you do??