Ok. I'm 30 weeks pregnant with my second baby. I was supposed to have an dr appointment on the 13th of this month. On Wednesday I got a call from a nurse saying I need to come in Monday for an ultrasound, should I be worried? I've called twice to see if anybody knew why I needed an ultrasound.. and both times they told me a nurse would call me back because it wasn't in my log. I'm absolutely nervous on why I need it done!?! Does anybody know what it could possibly be, the last test I had was glucose and it was normal.