<p>There's a lot of angst around these days. This heightened sense of fear, concern, insecurity and uncertainty can be overwhelming.<br><br><br>Bestselling author of The Book of Overthinking and The Book of Knowing Gwendoline Smith explains what angst is and the ways in which deep anxiety can manifest.<br><br><br>Gwendoline then drills down into social anxiety, which is often underdiagnosed but is one of the most common of the anxiety family...