My only advice is find a new doctor if this one doesn't cooperate with your needs. Don't waste time if he or she isn't willing to do anything to help you. Do your homework and find a specialist with a good reputation. If you feel like you need surgery, then you probably do. A cortisone shot and rest isn't going to do squat if your tendons and ligaments are destroyed.

All the best and hope you get back on the bike soon! In the mean time think about the positives..at least you're only missing out on crappy weather.