Have you ever suffered from butterflies in your stomach? A feeling of dread? Sweaty palms? Feeling that you are struggling to get a breath? Feeling nauseous? Or a general feeling of being on edge, startling easily?

Most of us have experienced this feeling at some point in our life. Usually brought about by being asked to speak publically, awaiting a job interview or waiting for life changing good or bad news. It's normal, it serves a function and we wouldn't be human without it.

But what do we do when it's seems to stay? When the feeling appears to come on for no reason and then doesn't leave us?