Every time I go in for my appointments they tell me I look tiny, but my doctor (and other doctors) tell me that I'm right on track, and that my baby looks to actually be growing about week farther along than they originally thought. My baby and me are perfectly fine, and I'm sure you and your baby are too lol.
The baby is supposed to gain half a pound, not necessarily you. If the baby is growing at the right weight and there's a difference in measurements since the last appointment and your DOCTOR tells you that you're okay and the baby is growing on track, don't worry about it. @firsttimemommy014 You have to take into consideration that maybe she's lost half a pound and her baby has gained half a pound. Weight fluctuates.