@fify-- If the 'do it yourself' exercises are not working, if you are having trouble doing them alone, tell your doctor about this. I'm sure he could send you to physical therapy.
Don't ignore this because it's best to complete the therapy soon after an injury. The longer muscles become idle, the more difficult it may become for them to learn movements again.
Your doctor may have underestimated the injury or overestimated your ability to complete the therapeutic exercises yourself. But the stretching and strengthening exercises are usually the most important and most effective way of recovering after injuries.