Hey phoenixml, I ws exactly the same and now have a very healthy and happy 8 month old. At the end of my pregnancy I was only 3 kg heavier than before I got pregnant and Claire 2.9kg when born. I didnt hve any extra weight at all till I was around 25 weeks pregnant, and even then it was only like 1 kg. I wouldnt worry too much if your ultrasound shows a healthy baby.