I have tried all kinds of self-help for my fear and anxiety and it hasn't worked - help me.
When you are in a state of anxiety it is because you believe that: "I am this body. The world and other people are something separate from me - something outside of me - something threatening!" This belief that "I am this body" makes you weak and vulnerable. Why? Because the body is weak and vulnerable and you are identifying yourself with it.
I feel certain that if you focus on a spiritual path, with which you feel comfortable, you will eventually transcend your fear and anxiety. Why am I so certain of this when all other methods have failed? Because all the great world religions, properly understood, take us on a journey from the individual to the universal, from the ego to the soul, from "I am this body" to "I am timeless, omnipotent, omnipresent, and eternal".
When you experience yourself as soul you are invulnerable to threats and their associated feelings of fear and anxiety.
I strongly recommend that you choose a spiritual path, one to which you feel drawn, and benefit from its teachings and spiritual disciplines. If it is a genuine spiritual path, then you will be nurtured by these teachings and disciplines and by the company of its adherents. In time you will grow stronger as your level of body identification weakens and your soul power comes into prominence.
If you feel unsure about choosing a suitable spiritual path then I recommend reading my book Unfold Your Wings and Watch Life Take Off as a first step. Like you, I used to be crippled with fear and anxiety and I know how debilitating it can be. My book will give you a true and accurate picture of how to live a spiritual life - a life guided from within - and how you can draw on your inner strength to find peace and contentment.
The full Holosync Solution consists of 12 levels and goes deeper and further - over some years of use - than other such aids to meditation. A much less expensive but still worthwhile option, to improve your health and mental and emotional well-being, is the Insight CD from the Immrama Institute.