6.Not everything your mind does is spiritual.

Some anxiety is a genuine disorder and some of it is just anxiety that will pass. Sure you and I need to trust God and let go, but if you have cancer, you need to get some treatment. If anxiety or depression is chronic or crippling, you likely need some treatment. If your anxiety or your depression is more situational (it comes and it goes), you may respond well to prayer, meditation, breathing exercises, and physical exercise.
If you would like to understand whether your anxiety is chronic or more situational, follow this link. And remember, be sensitive, what works for you may not be what will work for another person.