So to give a bit if backstory I sometimes had the feeling of being watched. I knew it's not true and also wasn't really scared of it.

Now while I was having intercourse with my girlfriend I somehow got that feeling again, again wasn't really scared or anything but instinctively I sometimes looked in the direction of the window. My girlfriend noticed this and got understandably really scared by all of it, of both the place where the window is located and of the image of me looking to the window. After that she also started to think of other unrelated scary things more often, as an example she was now also a bit scared of the dark.

We both thought that after a few days the feelings would get less, but she still feels more easily scared and the image of me looking to the window then automatically also pops up making her more uncomfortable especially at night.

We have been together for 5 months and I would really appreciate any advice on how to handle this. The thing that scares me is that she associates those scary things with me.

I have already been talking with someone about these thoughts after this. Before this happened the thoughts never bothered me but now they had an impact on my relationship. So in this post I'm really looking for advice of my girlfriend being so scared and associating those scary thoughts with me.

TLDR; I rarely had thoughts about being watched, those thoughts never bothered me since I knew them for what they are just thoughts. But during intercourse the feeling of being watched popped in my head again and I instinctively looked at the window. This understandably scared my girlfriend very much. She is now thinks of scary things often and assiociates those scary things with the image of me looking away.