I’m not worried about your baby, but I am a little worried about you if this is the type of thing you are googling and worrying about. I’m a worrier too so I can recognise your thought patterns as problematic! You’ll have to work hard to change this way of thinking.
Without getting too deeply into it, while those studies are interesting, there’s nothing very conclusive about this link with stress at an individual level. Some very very obvious confounders don’t even seem to be mentioned in a couple of the studies which I am therefore taking with a massive pinch of salt.
The original article you linked to on PsychCentral may have been “medically reviewed” and have a lot tick marks next to their references, but it’s not a good information source. It is not only misleading but I can readily identify at least 2 factual errors in it. It’s quite trashy! It’s there for clicks, not to help you.
I’d recommend the book “Expecting Better” to look at various risks in pregnancy in a very calm, scientific and rational way.