The midwives Im seeing won't weigh us either which is great!!
I have a friend who is very thin and she has always told me she only gets a little bump and looks not pregnant from behind etc. Anyway, she is pregnant and is huge, so I would say the ones having a go at you are probably overexaggerating anyway!!! And I don't know anyone that would fit in their normal clothes at 14 weeks, not without the clothes feeling tight anyway. I definitely am out of my clothes but people still say Im not showing (they just can't see the huge amount of fat I've gained) LOL..