I'm in agony and I'm not sure what I've done. I was walking back to my car this afternoon when I got a sharp pain in the underneath of my foot in the arch. I was nearly sick with the pain. It's very swollen and the pain is throbbing. I've sat with an ice pack on it for 2 hours and I've taken ibuprofen. I very nearly went to A&E as it was so bad. Could a tendon have snapped do you think ??