Am i day dreaming or having some kind of delusion?

Hi all, in need of some advice.

Lately I've been having very short but vivid day dreams, it's only happened a couple of times but when they do it scares me to think that I could imagine myself doing such a thing.

I wont go into too much detail but basically they're all surrounding causing pain or very possibly death to someone (or something) and not knowing what to do after. When I snap out of it it's like everything back to normal but I feel guilty about it because I don't really want to hurt anyone and very often the subject of the day dream will be someone I care about deeply. I don't know what to do!

I've recently moved back to my parents house leaving my partner behind to finish his work and started a new job so it's been pretty stressful but I've been taking the advice that a doctor gave me about my anxiety which was basically keep calm and carry on (and no I'm not on any medication so I know it's not any kind of side effect).

Anyway, before I go wasting a doctors time, I just wonna know, do other people have these? Is it fairly normal but nobody talks about it? Let me know in poll please, thank you everyone!