If no meds are helping, and you are not getting any help from CBT, perhaps you should try and battle this yourself. It sounds like you are depending too much on CBT and meds. Anxiety is something that starts in yourself like I said. I hold the opinion that you can take all the meds in the world, and receive all the kind of therapy that exists out there, but ultimately, the change starts within you making that change yourself. Meds and therapy are used for guidance and to make the ride smoother; in no way does it battle with the source of anxiety.
I know it is much easier said than done; believe me, I am not very good at taking my own advice. But that is why we have these forums. This is why we discuss the problems together in order to look upon our anxieties objectively.
I am currently battling with some stomach symptoms at the moment; I am worried about it being stomach cancer and for my life to be doomed. I am scared to make plans and I feel a little of despair when I look around at people living their lives - it is a really horrible feeling that I am going through. But I keep telling myself that it is more likely anxiety causing my symptoms. I am only 21 and I have read that the odds are 1 in a million. Not only that, but I am trying to overcome the fear of death, period.
My anxiety is like a roller coaster; I feel calm but then suddenly a bout of anxiety can hit me and send me into a panic attack - to which then it becomes a battle of trying to calm myself back down to where I was - which usually takes a lot more time than it does for it to just come straight back.
But just try and hang in there. You will make it through - and like I said, don't depend, or rely on meds and therapy too much. If you don't believe in yourself, I don't know in which way you think meds and therapy will work towards your anxiety. The change starts with you; the meds and therapy are supplements.