Should i be worried about my ten month old?

i have a ten month old daughter and i keep worrying that she is "behind". maybe im just paranoid. but she can not crawl or walk. she makes no attempt to crawl. but she does "roll" everywhere. she sits fine but she cant be laying and sit up by herself. she does not pull herself up to a stand. for... show more i have a ten month old daughter and i keep worrying that she is "behind". maybe im just paranoid. but she can not crawl or walk. she makes no attempt to crawl. but she does "roll" everywhere. she sits fine but she cant be laying and sit up by herself. she does not pull herself up to a stand. for example standing by the couch. in fact she also shows no interest in standing either. the past two weeks, everytime we try to get her to stand she pulls her legs up. so in your opinions.............is she okay?
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