I'm 36 weeks and a couple of days. Had an ultra sound last week after measuring a little small at my 2 previous appointments. When I went in today the nurse said that everything looks good and the amount of fluid around our girl looks good, she's just on the small side, but healthy. She may end up being around 7 pounds at birth, maybe a little less. She was measuring about 5 lbs. 7 oz. last week at the ultra sound.
Try not to worry until you see your doctor after the ultrasound.