VIO and I waited five years to have kids....and then we waited another four years before she got preggers. My friends and family were kidding me about shooting blanks.
It's always puzzled me why teenagers often get pregnant on their first try. Seems like when you want to, you can't, and when you don't want to, you are.
My BiL just had his fourth kid at 56. So late starts are not unusual.
Congrats and good luck.