If you truly trust in Christ, you know that you are in his hands and you don't need to worry about anything. This way you give the Lord complete freedom to do what he wishes with you, and, of course, he always wants to give you what's best for you. On the other hand, if you worry and project what might happen to you, then the Lord is not free to carry out his will, for he'll have to override yours first. In any case, our lack of trust won't help things a bit. To trust in God is to obey him!