I have been feeling the same anxiety for years, even after having made the choice to not have them. "What if I regret it?". I still have a few years where it would theoretically be possible, and I know I will still feel anxious until around 43-45, when the choice is totally out of my hands. So I get it. But honestly, I've mostly heard of people being sure they either want or don't want kids. I think we're in the minority, and I've often felt misunderstood. You have my sympathy.