I need advice on my doctor search

Now that Im beginning to feel well enough to speak cogently, I am beginning to plan for my future.. I know that I cant go much longer without a medical professional to turn to if something happens unexpectedly. My current condition was caused because of a complete failure of both a hospitalist and the doctor Ive trusted (wrongily) for 18 years.. Ive not confronted my PCP (the aforementioned doctor) because he has refused to understand.. I've researched on my own for 5 months now.. I have all the evidence documented. I can PROVE that they were wrong. BUT, i know that to do that alone would cause my nervous system a great deal, and probably not produce a gratifying result. So, today Im setting out on anothr project to find a new doctor and to change my health insurance. I''m in So. California, on Medicare.. If you have any suggestions.