For a teenager, it was an unexpected and shocking diagnosis: blood tests and an ultrasound confirmed that, at 13, Hayley Cockman had gone into premature menopause. Her periods had stopped within a year of starting, and then symptoms such as night sweats, hot flushes and poor concentration kicked in. 'At school, I'd be sitting in class, having a hot flush and thinking, 'What's going on?' I didn't have a clue,' says Hayley. For a teenager, it was an unexpected and shocking diagnosis: blood tests and an ultrasound confirmed that, at 13, Hayley Cockman had gone into premature menopause 'I kept ...