Some doctors are more aggressive on monitoring a child's development than others. She's probably wanting to do more with your child because crawling is an important developmental phase. Studies show it plays a role in sensory development.
With that said, I have been reassured by my pediatrician, while it isn't the ideal if a baby goes right to walking, it doesn't necessarily mean there is something wrong. Some kids skip stages for various reasons, and there's nothing wrong with them. Often if there's an older sibling who is mobile, the younger child will skip stages purposely to keep up with their big sister/brother. My second child maybe "crawled" for about a few weeks and suddenly started pulling himself, only to walk within a week after that. He was also a very young walker.
Things that help a baby with crawling is tummy-time. Get a playmat with a roll built into it, and put baby on her tummy and use toys to encourage her to want to crawl toward you.
A doorway bouncer is a great way to strengthen baby's legs for walking. Both of my boys went crazy for our Graco doorway bouncer and I'm certain built up their leg muscles using it. They'd spend a half and hour or more going to town on the thing. It was their favorite physical activity toy hands down...even more than their exersaucer, push car/toys, etc. I highly recommend the doorway bouncers with a built in table as the child has more freedom to actually walk as well as bounce fairly high, unlike the more stationary portable versions. It seems they get more physical exercise with the doorway bouncer.
Lastly, if your daughter doesn't start to walk or crawl soon, don't fret. I have heard that late bloomers can turn out just fine also.