I was 24 when I had my first panic attack. I was sitting in the cinema when I started to feel very uncomfortable. My heart began to race and my whole body began to tense up. At first I thought it might have been an allergic reaction to something, then I began to fear it was something more serious like a heart attack. I left for the toilet and was so terrified I could not go back to my seat. That was the first of many anxiety or panic attacks I was to experience over the next few years. I did not...