9w2d here and I'm down a couple pounds. I haven't felt good this pg at all, and finding something that sounds good enough to eat is hard.
With my other kids, I usually put on 10 or less pounds by the 20 week mark and wind up with a gain between 25 and 30.
I'm starting out a lot heavier this time (thanks to thyroid problems), so I don't feel like I need to gain as much this time, but I will not restric tin order to make that happen. I eat much better when pg, only eating when hungry and always stopping when I am full and healthier things most of the time too, so I think that will help.