obsession about geometric shapes

hi, when I was younger, I was obsessed with first rectangle, square straight line, always when I had any problem abut I was obsessive thinking, when I though that it is not so important, because there is straight line. So this line (or rectangle or square) was very important form me. When I had doubts, that those line is possible to exist, I felt in panic. is that any disorder/ mental illness? How common are those disorders?

When I was younger, I had a strong awareness of symmetry. Things being equal on both sides. I had to treat both sides of my body the same as well. For instance, if I scratched or bruised one arm or leg, I tried to match the injury on the other side.
I eventually grew out of doing this as it wasn't that important anymore.
I think that we can go through exploratory magical thinking about these things when growing up. I remember the way I felt from 50 years ago, but don't consider them a disorder as they are in the past and no longer relevant. Maybe just a mild case of juvenile OCD?