There are two types of confession: (1.) Confession of one's faults and sins to obtain forgiveness. (2.) Confession of God's word over our lives to activate God's blessings in our lives.
'Death and life are in the power of the tongue' - Proverbs 18:21 Be aware, that we have two mouths. The 'inner' mouth and the 'outer' mouth. The inner and outer mouths must come in agreement before your confession. The inner mouth is the voice of your thoughts and reasoning. What you think longest becomes your conviction. If you keep saying your cursed, soon you will start saying it aloud and you will attract troubles and stop God's blessings in your life. Every word that comes out of your mouth has been first spoken inside and then comes outside of your mouth. So think before you speak, because what you speak can either make or break your life! We must confess and repent for your sins wholeheartedly.