Struggles with Emotions in Relationship

I am finding myself struggling with my emotions in my relationship. I have a strong emotional reaction to something and have no idea why. My husband questions me and my behavior and I have no real answers. Then it escalates because I don’t know what’s wrong and want to end the conversation.

There are times at the end of a discussion that I am really teary and upset. But by that point I have no idea why I am crying, the tears are just flowing and I let it. My husband wants an answer for the tears in the moment and I have none.

How do I work on figuring out what is actually triggering tears/ disgust/anger or a strong reaction in a moment? Even after the fact I will have some possible answers but nothing seems like it would merit the response/feelings/ reaction I had.