Not pulling up to stand? 9 months today

Ashley
Hi Paranoid Mom here Lolol thank god my husband and I think we are only having our one baby bc I'm such a worrier I don't know if I'll survive a second baby! 
So my daughter turns 9 months today. Yesterday at her doctors appt everything went well. But she asked if Violet was pulling up to stand. She is not or crawling yet, just insists on rolling everywhere. The doctor checked and said just practice standing a little her legs need to strengthen she should be fine. 
But I'm crazy and now can't get the Thought out of my head something is wrong! She sits up great for a long time unassisted, she jumps away in her jumper, she claps, says words. But of course I let this one thing bother me. 
Please someone other than my husband and mom tell me I'm crazy and other little babes are at the same spot? 
Here's a pic, just because Lolol. 
Thanks for reading!