I agree with all of the above. Stop riding until your doctor clears you and follow their advice. It may be helpful to get a second opinion, if he tells you to stop riding permanently.
1. Overtraining. Ease back some. Make sure you're getting proper hydration/nutrition, before, during, and after your rides.
2. Get a professional fit.
3. This may be part of the fit, but look to see if you need a new seat. It may be that the saddle is compressing something the wrong way, and a new saddle will ease that.
4. Physical Therapist
5. If all else fails, get a recumbent.
GH
Last edited by ColaJacket; 05-22-15 at 11:17 AM.