The baby won't need much more that you are probably already eating. In the second trimester, they recommend you increase your calorie content by about 300...but the baby will take from YOU what he/she needs.
Make sure you are taking a prenatal vitamin. Any will do, just if you take the gummies, you will also need an iron supplement. And drink a lot of water! Juice is also good while pregnant for a few extra calories.
I eat several smaller meals a day now...I'm 20w4d...and I was able to avoid morning sickness completely. I've been told its because I physically can't gorge on a meal and HAVE to eat several smaller meals or snacks--that was preventing the MS.
If you have been following the eating recommendations from your Lapband doc, you should be fine. Lots of protein, veg and fruit are good for you and the baby!
That all being said, I'm having a girl and crave sugar alllllll the time now!! I try to eat more fruit because of it, but I'm giving in once in a while and eating that cookie or small candy bar. Oh, and gummy bears are my best friend. Geez!! Ha! All in moderation is ok. I've only gained one pound, so I guess it's alright.
Let me know what other questions you might have! Not that I'm some expert, but I do know what you're going through!
Sticky bean dust for you!!!