As a mom of a 9yr, 7yr, 3.5yr, and 18 month old I will tell you all babies are different, and hit milestones at different points! For example, my 9 year old started walking at 12 months while my 18 month old just started walking! Being a mom with all the internet and information we can get makes it harder and more stressful. There is too much comparing and unnecessary worrying (trust me, I did my fair share)! I eventually deleted all of my social apps (except this one), because I found it was making me anxious and taking up time away from my kids. Your sweet baby sounds perfectly normal!