Without
a serious underlying medical problem, no, anxiety
can NOT
kill you, neither
can a panic attack, as scary as they may feel.
Obviously, what you're doing right now isn't managing the anxiety at all, therefore, you need to have a discussion with your doctor about how to proceed. I also highly recommend trying an SSRI type antidepressant, like Zoloft, Celexa, Prozac. They have been very effective in treating anxiety disorders.