How do I recover from tendonitis and get the painful symptoms under control? Is there a support group ….?

I have painful tendonitis symptoms in my right wrist caused due to repetitive typing and mousing. I have tried everything from ergonomic evaluation, to physical therapy but the symptoms keep coming back. Sometimes it gets so debilitating that I even have trouble holding the steering wheel. I am really really desperate to get better, to not have the tenderness and burning sensation, be able to play tennis again , to indulge in all the activities I used to…….. Any tips/suggestions are more than welcome. If there is a support group for people like me in the bay are, please please do let me know