If you're doing exposure therapy, or just trying to do things that you want to do in spite of anxiety and panic, remember this mantra - face a little discomfort today for a more comfortable tomorrow.
You have to feel the panic to get evidence that it's only a feeling and it never lasts. The more you experience the feeling, the more you habituate to the feeling.
Panic can't hurt you. It's just uncomfortable, you will cope.