I am naturally very thin, but definitely had to right the ship in my first two pregnancies after going a little overboard in the first trimester (I ended up gaining 32 pounds the fist time and 26 the second time, so don't worry - your gains will probably even out). I'm pregnant with my third and I have been able to limit my weight gain this time because I learned that I had high cholesterol after my second. So far, I'm eat a lot of egg whites (no yolks because high cholesterol), sweet potato fries (cut up and baked sweet potatoes), rotisserie chicken, fruit, siggi yogurt, and lots of veggies. I'm not a big fan of getting prepared foods, but I have bought salads a few times from CHOPT because it feels a little indulgy and tastes really good. I love sweets, so I still eat sweets but I try not to eat sweets or packaged foods that I'm not really excited about.