Be wary of weight loss

Alex

So as soon as I found out I was pregnant, I switched my diet to a healthier one. I don't eat less, I just choose healthier food. In so doing I've lost 7 lbs in less than 7 weeks and so now nutritionist is panicking, because I'm in danger zone for weight loss. I've been told to pack on some weight or try to lose nothing more. I was 255 and now I'm 248. I have been eating fine and drinking a lot of liquids. I'm just worried because she's worried. I swear I'm eating at least every three hours