I am 26 weeks pregnant and at my last doctors appointment on Friday the doctor said that I was measuring small/behind. She didn't acted worried or anything and said to come back in 2 weeks and if I was still measuring small she would do an ultrasound. I am a pretty small person to start with 5'3 and 122 pounds pre pregnancy. I now weigh 137 pounds. Has anyone else been in this situation and it been ok? I am so nervous now!