I’d met so many soldiers, so many young men and women suffering from post-traumatic stress, and I’d heard them describe how hard it was to leave the house, how uncomfortable it was to be around other people, how excruciating it was to enter a public space – especially if it was loud. I’d heard them talk about timing their visit to a shop or supermarket carefully, making sure to arrive minutes before closing time, to avoid the crowds and noise. I’d empathized with them, deeply, and yet never made the connection. It never occurred to me that I, too, was suffering from post-traumatic stress.