Don’t take the current behavior and start extrapolating the larger trends in the marriage because this incident seems like a good segue into getting ‘everything out in the open’. Stick to this one incident; you can bring up the other stuff later. When you are in a more calm state.

At first conversation: “I want to talk about what happened yesterday. I needed to take the baby to the doctor, but when I went out to get into the car, I saw that you had taken it. I had to take two buses to get there. It was a major hassle.”

Then, when you are calm, you can talk about how frustrated you are about the lack of consideration in several incidents recently.