Should I go on a holiday without my pregnant wife?
That depends. Is this plan to protect your pregnant wife or because you want to get away from your pregnant wife?
It is a bit of both.
This is just running away from your problems. You need to confront your wife.
She was being emotional, so I needed to get away from her now.
I can understand that you are having trouble with dealing with an emotional pregnant woman but you still need to be with her. What if you go on vacation alone and she goes into labor or something happens and she needs medical attention. You should take her with you on vacation so you can keep an eye on her.