I am measuring pretty far ahead and Dr suspects multiples so is doing an ultrasound next week to either confirm his suspicion or figure out why the disparity. I've looked up other possible reasons for the difference and now im.freaking out. I guess I'm just hoping a twin mama had a similar situation. I've also been super light headed since day 1. extremely nauseated. And so tired I literally can't stay awake an entire day. this is my 3rd baby 4th pregnancy. my last pregnancy was molar and I measured larger because of tumors BUT had no other symptoms. So I'm trying really hard not to go there with my mind. just some positive similar stories would be awesome.