29 is 29... it's aging at the exact same rate as you age when you are 10, 15, 45, 90....
If someone is older than you, you can still be a "young woman". If someone is younger than you, they won't consider you a young woman.
Everyone reaches milestones at their own pace; some choose to skip them. To each their own, nothing is unusual.
It is not weird in the slightest to work with children and not have any yourself. Even people in their 70s or later can still work with children without ever having had any themselves.
Honestly, you need to stop worrying about what other people think of you - who cares as it's YOUR life and you can live it how you want!
Trust me - I get the feeling from general society's pressure. I'm just hitting 30 this month

I'm a teacher, and I do not have children! I don't even particularly want any. I don't own a house, and I am not married. I am in a relationship, but it's been for less than 4 months (although it's the most healthy one I've had, and it seems like it has long-term potential). I do not have my driver's license and thus I do not have a car either! The only thing I have is that I have a permanent job, and I have my own apartment (but that is because I live somewhere where it is affordable).
Everyone's life goes at its own pace. It gets influenced by different things - level of education, cost of living, job availability, how isolated you are, etc etc etc......
As long as you're happy and working towards whereever you want to go, then it's fine