Congradulations
The most important thing to remember is to relax and have fun with it. It only lasts 10 months and at the end you actually miss some parts of it.
There are a few women on this bored that are currently pregnant and LC, or recently had thier baby and are LC. You don't hear from them much, something to do with alone time or computer time vrs sleep. Sheesh like who wouldn't choose online over a nap
There is a book out there "A Mother-To-Be Does Atkins". It is written by a doctor at one of the Atkins clinics who was pregnant with twins. It gives some of her typical menus.
You might also want to get Atkins for Life as it is geared more tword maintanance.
Remember while pregnant you only need about 300 more caloires a day, but tons and tons of nutrition. LC is good for that because instead of a large piece of cake, you are getting your calories from nutrient dense foods such as veggies, fruits, and protiens.
Each day be sure to have alot of veggies. Start including a serving or two of fresh fruit each day as well. I know it's winter so look for frozen unsweetned berries as well. Just be wary of those that add sugar. It has no benifits to you or baby. Eat dairy if you can tolerate it in the forms of cheese, plain unsweetned yogurt, or maybe some LC milk. Have whole graines, not overly processed white bread. Choose brown rice instead of white and monitor portion sizes. And above all, be sure to take your prenatal vitamin.
Like I said earlier the Atkins for life would be good. It seperates things into easy tables. What foods to eat often, in moderation and rarely. It also discusses what the portion sizes of each food really are.