Anxiety can feel like your mind is racing, your body is tense and your thoughts are impossible to switch off. Sometimes there is an obvious reason for it. Other times, you can feel anxious even when, logically, you know that everything is okay. You might notice a tight chest, shallow breathing, a racing heart, restless thoughts, difficulty sleeping or a constant sense that something isn't quite right. If you've ever wondered, “Why can't I just calm down?”, you're certainly not alone. The good...