Very sorry that you are going through this. I know exactly how you feel. After a block this January my RSD spread to my back, neck arms, hands...basically everything between my waist and neck...and I went through so many tests to rule out other things and to confirm that it was actually from the RSD. I prayed every day that it was something else...that one of these tests would come back positive for something else...but none of them did. It took months to run all the tests but once it was determined that it was the spread of the RSD...at least them we were able to start treating those areas properly because no one wanted to do anything until we knew what was causeing my symptoms. Such a frustrating situation because it feels like you are stuck in limbo while waiting for all these test results. Good luck.