E.E.
Listen to your body. This is totally normal. I was starving throughout my entire pregnancy and I ended up eating all the time, but I was smart about what I ate (for the most part) and gained about 35 lbs. Bring your lunch plus extra snacks to work with you. I used to pack up snacks the night before in little baggies so I would not be tempted to eat too much or go pick up fast food at lunch time. The key is to eat small frequent meals or snacks with some protein in them- nuts, crackers with peanut butter, granola bars, and I also ate carrot and celery sticks just to give me something to munch on. Also, make sure to drink enough water, or herbal tea would be good too. This helps keep the nausea at bay and if you keep the portions small, you will not gain too much weight. Also, I took walks every evening with my husband for some exercise. Since you have a little girl, maybe you could take her for walks after you get home from work. I also rented a prenatal yoga dvd from Netflix that was nice.