My little girl was born at 28 weeks at 2 lbs 8 oz. She is now 7.25 months actual and 4.5 months adjusted. She has mastered the rolling from tummy to back and back to tummy but now she always rolls from her back to tummy and gets so mad but it seems like shes trying so hard to crawl. She is about 16 lbs now. When did you see your preemie crawling?