Bring your running shoes and log book to the exam. Work with your doctor to determine how the injury developed. Map out a plan to rehabilitate the injury as well as to maintain your training. When you know you're working for a resolution to the injury, you'll feel more positive. Follow your rehab in your log book.
Few things feed depression more than blank pages in a training log.
If things don't seem to be working, don't be docile. It's your responsibility to get better. Communicate with your doctor. Fool me twice, shame on me. The same is true for recurring sports injuries.