There’s a difference between supporting you to deal with your anxieties in a positive way and pandering to you and not being honest with you when you are off on one. It does sound like you acknowledge that you over react to things but that you don’t seem to want to change, yet deep down you know you do over react as you’ve told us that.
Looking after someone with anxiety can be exhausting and frustrating. Sorry OP but you need to try and get help for this as it will affect everyone, including you, and you deserve to be happy. So does he and the kids.
Can you not let go of your anxiety because your fear is to great, “I must protect everyone, I must make sure we are all safe and examine every little thing to make sure I’m doing my best, nobody else can be trusted to make decisions...” type thing?
If so that must be exhausting and you have to find a way of reining that in. A way of coping to try and find what is reasonable to fear and what’s OTT. Self help books/videos, private counselling (nhs queues are long, some charities offer it for cheap/free)
Perhaps if you feel that the noise may scare the baby you could practice reassuring him/her and yourself? “I know the kids are screaming at their game but it’s ok baby we are both fine, kid noise is normal and all is well in my world” while rubbing the baby and employing a self help technique like breathing or do meditation? It may help and save your anxieties mounting if you can head them off before they get OTT.
If he guessed correctly and you meant that he was the cause of the noise etc and it was indeed his fault, could there be a better way to deal with such things? Like e planning that everything was noise and would it be possible to reduce it, or by you leaving the room and doing a minute meditation (or longer)?
And let’s recap, his feelings were hurt because you blamed him for making your unborn baby sad, he was upset and walked away. (Understandable as he loves his unborn baby)
Later you discussed things and that his silent treatment upset you, you were upset and walked away. (probably recalling past episodes of that, feeling not listened to etc).
You are both dealing with things in the same way and both if you need to try and not take offence or read between the lines as that ain’t working.
Perhaps you could both try harder to remain calm even if you explain you need to leave the room for a short while with a view to having a convo later to work out what happened after? And do that. All calmly listening to each other and saying not implying stuff.
You can work through this but the key is you changing. Sorry OP, I’m sure he’s not perfect either but you can’t change another person but you can change yourself. Then he may be more happy too to have the old you back. I hope you do well and feel much happier soon 