Curious: have you ever considered going to a therapist about this? It's not psychologically normal to never want children. I wouldn't be surprised if it was also co-morbid with other psychological issues.
Apparently it's very normal. On top of that “abnormal” does not mean “unhealthy”, but then again, that's something psychologists very often don't understand either.
Having an I.Q. above 145 is certainly not “normal”, but not a cause for concern either.
https://www.theguardian.com/lifeandstyle/2019/may/25/women-h...