@ED81 it's normal to second guess yourself and your choices. The future, for everyone, is a great unknown. I don't think I made an actual decision to nit have children. I just knew I didn't want them and when I pictured my future life, children weren't part of that picture.
I hated being a child and found childhood frustrating and boring. I wanted to be a grown up almost as soon as I knew the difference. To me childhood wasn't magical -it was the holding bay to my real life as an adult.
Because I hated being a child, I can't relate to young children. I don't know what to say to them, how to play. I find their chatter tedious and nonsense and I am always counting down the minutes until I can part company with them. So, feeling how I do about children, I thought, why have them? It would be a miserable childhood for them and a miserable life for me.
We did inherit two teenagers when their mother died - but due to their difficult life they too have no interest in childish things, are more mature than most adults and are great company.
If their mother had died ten years earlier than she did, we would not have taken them in because we didn't want young children in our life and they would have been better with people who did.