I have started my pregnancy at 72 kilos (158 lbs), and have not gained any weight during the first trimester (up to about 18 wks). But now, in the past 10 wks, I had 6 kilos (13 lbs) pile upon me. I'm really not sure if it's normal, as everyone says you should gain most of the weight in the 3rd trimester. My doctor even warned me to be careful, but I don't eat much at all, try to eat very very healthy, so I have no idea where this weight has come from Is this normal? I know I cannot diet, but is there any good way to control how much I gain? I'm really scared that I won't be able to lose it, as I'm hypothyroid too, so already have difficulties with losing weight. The strange thing is that my clothes sizes didn't change, I wore size 12 before, and still wearing size 12 maternity. Is it possible that the rate of weight gain will slow down in 3rd tri?