Can being scared/startled cause problems during pregnancy?

I'm only asking because with Halloween coming up (I'm NOT a horror person at all. I get scared easily, and of course being scared stresses me out. Especially if an ad is triggering for my past traumas), I just wanna know if I should be extra careful or just use my usual caution. I know it might seem ridiculous, and I'm probably being paranoid, but I just wanna be sure. The month of October is usually stressful because of all the horror ads that pop up when I'm watching something innocent. Anyway, if I end up seeing a horror ad (even for a few seconds can bother me) and it scares me or makes me jump, and that happens through the month of October, could that cause harm to my baby or anything else? Of course I do what I can to avoid being stressed out normally, so I take care of myself. But despite that, can it still be an issue? *Please take this seriously, when I looked it up the answers werent helpful because it wasnt taken seriously*

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