Feel like I did something unforgivable

Hello, really scared to post this but I need someone to calm me down.

Currently in my mid 20s, I have had different forms of OCD for most of my life. One of these is POCD.

This incident that is bothering me now happened many months ago. I don't know if this particular thing is OCD.

My family lives in an apartment building and we have many neighbours. One of the families are close to us and they send one of their kids to our house to play. She is 4 years old.

One day she was just hanging out in my room, I had this thought (non OCD) to touch her jaw area. It's a very weird thing and it has some thing to do with me fixated with bone structure of faces. I don't know why I started to have this but I do. I initially had this anxiety (which I thought was OCD) to not do this as I would be molesting or inappropriately touching her.

I thought that my mind is blowing this out of proportion. I thought I was not harming her or doing something that clearly falls in the predatory area. I also felt that since she's a kid, she won't be bothered but this compared to if I did something like to grown up kids or adults. My rationale being its normal in cultures to touch kids faces or make funny faces with them.

I then touched her jawline and it was a few seconds. I must have held her hand to restrain her as what I did is so weird. Why did I behave like this? I was a bit anxious when I did it. Even after that I was having what ifs constantly but I tried not to give into it.

A few months later, after my other OCD themes started clearing up thanks to ERP, this thought started popping up. I gave in. The more I thought about my actions and what they mean the worse I felt.

The only thing that gives me comfort is that the way she interacts with me is the same. She doesn't have an issue with me, basically the same before and after the incident. But I constantly think stuff like "I inappropriately touched her" or "What if she was uncomfortable?" It never crossed my mind before she could be uncomfortable. My brain tells me this after it's happened which is the annoying part.

I feel awful and I don't know what to make of this and how will I be judged here. Everytime I see her I feel guilty and full of shame. I know I'm not someone who would hurt or make anyone feel uncomfortable with physical or verbal actions intentionally. Yet I feel like the scum of earth.