My son(37 weeks) sat unassisted around 8 months, crawled around 10-11 months and walked at 14 months. I rememember taking him for a checkup at almost 7 months as he wasn't yet rolling over. (they sent us to a PT and he rolled the day before we went)
My daughter (33 weeks) sat unassisted around 9-10 months, crawled around 11-12 months and walked at 16 months.
Your daughter is still in the range of normal for her adjusted age. If you say she's bright and active I don't think I'd worry too much for now. Have you spoken to your dr about your concerns? They might be able to show you some exercises to help encourage those milestones, or a referral for PT if they think it's warranted.
