When arguing about money, couples often think that they are talking about the numbers or the budget. In actuality, feelings are pouring out - through tone of voice, body language, rising heart rate, dissociation, etc. These feelings actually drive the conversation and the resulting outcome.
Self-awareness can help substantially during financial conflict. Learning and knowing your financial beliefs, fears, needs, and triggers will enable you to be more present, communicative, and vulnerable throughout the conversation. You can always grow in your relationship to money, and exploring your relationship to money will help you to better express your financial shame or financial anxiety to your partner in the moment.