Your anger might be right. What you do with it still has to answer to God.

Anger is often accurate. Something unfair happened and the reaction is a correct reading of it, which is why being told to calm down feels insulting. Being right about the cause does not settle what you do next, and that part is still yours to answer for. Righteous anger and cruelty look identical from the inside at eleven at night.

Let yourself be angry without deciding immediately what to do with it. Take the situation to God and say exactly how you feel about it, unedited. Then choose the response you could describe honestly tomorrow.