I actually lost 4kg in the first 12 weeks of my last pregnancy because my ms was so bad, then I took ages to gain any weight but still managed to gain 11kg by the end of the pregnancy, which is the same total weight gain with my first pregnancy. I seemed to put weight on really quickly from about half way. Funny how it's different every time. Hopefully the healthier diet is working and you will end up not gaining much this time, so not so much to lose after you have bubs!