I lost 11 lbs during the first trimester, and I'm 15w+2 now and I've lost a total of 14 lbs. I had no appetite for the longest, but now that I do, I'm still not gaining either. And I am FULLY embracing "eating for 2" this week... And nothing. I feel you. But as long as your baby is healthy, and you ARE eating sufficiently, you should be fine.