Hi, congratulations on the birth of your son. It sounds like the beginning of OCD (or a very strict routine). My mother went for years without being diagnosed with anxiety and accompanying symptoms which included OCD and her routine mirrors yours with some extra extremes.
I was diagnosed with OCD some years back but have been able to rid myself of it with CBT. I still have little things that irk me but I control the need to make everything right in the world
I still marvel at the amount of time OCD stole from my life.
In the meantime, relax and don't think about it, it'll lead to exhaustion and you need your strength to care for your little one. Let your professional guide you to help find the reasons behind your behavior. I'm sure you'll get the needed help you need with therapy . . . hugs