I think you'll probably put weight on at some stage unless you were quite a bit overweight to start with.

The fact is that skinny people generally put on more weight than overweight people.

I was overweight. Didn't put on any weight until very late in the pregnancy and ended up putting on 8kg in total, most of which was fluid. I know this because I lost 13kg in the week following the birth so ended up 5kg less than when I started.

The same seems to be happening in this pregnancy (although I was a normal BMI when I conceived). I've not put on anything so far and it would be lovely if that continued but realistically, it won't. My portions are much smaller than they used to be because I can't exercise so therefore don't need to eat big meals.