My youngest was born when I was 47. He’s now 9. I also have a 13 yr born when I was 43. I’m tired but I don’t think it’s from the kids. (More I’m tired of working - been burning the candle at both ends for nearly 40 years.) The biggest difference of having kids at this age is that I don’t have time to myself or for myself like other parents around me so are by now empty nesters or close.