3 weeks ago I went to have a special ultrasound because my measurements were two weeks behind. I went back today in the doctors tell me my baby stomach isn't measuring correct so I have to go back in  3 weeks and he said if she is t growing than we gonna have to talk what dies that mean? I'm really worried her hear rate and her movements are perfect I just don't understand why she's not growing I'll be 31 weeks tomorrow and she's only 2lb 13oz has anyone been through this???