I deal with panic disorder on a daily basis. Sometimes when I'm depressed I have no anxiety - I'm just dead inside and don't care about anything. Other times I have crushing, debilitating dread (the worst!!). When hypo my anxiety vanishes, but as soon as things start to turn I get a more agitated/racing obsessive thoughts 'brand' of anxiety.
CBT actually really helped me in the past - did more for me than any med ever has. I now take zoloft for anxiety but I don't know how much it helps. I also take ativan prn but I find it very addictive so it's really not a sustainable solution for me. I also just started a CBT/mindfulness therapy course that is very helpful so far - I highly recommend it.
The 'good' thing about anxiety (which, for me, is actually worse than depression) is that it actually does respond very well to therapy. Good luck