Probe by asking questions of yourself:
What is my part in this?
Is there a fix?
What questions could be asked to probe the situation?
There could possibly be other questions that would need to be asked of yourself while trying to get to a version of the truth before confronting the other party. Time is not on your side when contemplating these issues. A lot of time can be lost and you left in limbo asking questions of yourself. The time you take for yourself to propose and create these items of and for yourself be sure to use them “the questions”as soon as possible.
Conversation is still crucial and being in a calm and controlled manner is best. Anger and raised voices do nothing to help either side.