You may say:
I'm scared of the dark. I'm nervous about the future. Afraid this illness will get the best of me once & for all. Will my family be saved? Unsure if my marriage will last. I'm afraid to stay home alone. I don't think I'm smart enough to accomplish my goals. Haunted by my past. Scared her words were true; she was right about me. I'm afraid I won't make an impact on them. Nervous that I won't find a mate. In constant fear of missing the rapture. Worried my child won't be saved. I suspect my wife is cheating. Afraid I will eventually give in to temptation. Have I ruined His plans for me? I've always feared an early death. I'm worried about my bills/need a better job. I never feel I measure up. I always worry of others' opinions of me. I'm living in fear of an abusive relationship. I'm scared of failure. I'm terrified of rejection. Feelings of inadequacy. I don't like decisions... What if I choose poorly? I'm scared of dying. I don't want to be alone.
But He says:
Trust in the LORD with all your heart, and do not lean on your own understanding.
Fear is essentially having faith in your enemies... So have faith in God & fear not.