Emotionally vulnerable 34 weeks

So I just got super upset with my partner yesterday because of something and just did a lot of overthinking perhaps and ended up crying and emotionally stressed out. I am so worried if this harms my baby in any way? I read mental stress produces cortisol hormones and they pass on to baby so baby can feel the same emotions to the same extend.

I would normally just argue and get over with something that I was not happy about. But in pregnancy I am so easily tearful and just can't have an argument without crying my eyes out. I hate this because I feel so emotionally weak like I am being victimized. I hate building up anger in my mind and I just ended up thinking about a lot of consequences when I could have just straight away told him that this was bothering me and that I don't want him doing it.

Have you also been through such phases and how do you deal with it? Feels like the logical part of my brain is shut and I am completely emotionally driven. I so desperately want to have some control over my super sensitive emotions these days😔