Does not want to crawl

by Kelly
(Michigan)

My eight month old daughter does not want to crawl. In fact, she doesn't like to be on her stomach or even try to play on her stomach. She lasts a few mintues even with stimulating toys in front of her. She starts to cry then it turns into a loud shrill. She's a very over dramatic baby. She doesn't even try to move while on her stomach and sometimes will figure out she can flip to her back so she doesn't have to be on her tummy anymore. She stiffs her legs out so that their in a straight position and won't bend them at all.

Her cousin is only 7 weeks older than her and has been crawling for over a month now and can walk holding on to objects and stands up on her own. I'm also 7 months pregnant. Could this have something to do with her developmental skills or is something seriously wrong with her? Her cry isn't normal either. She will scream at the top of her lungs for twenty minutes and not be worn out.