I'm happy to read your new pm dr would like to have you admitted to the hospital for an extensive work up. I know it is scary when a dr tells you that you have to go in as I have been in & out of the hospitals so many times in the last 4 years I lost count.
I have had to go in and out of the hospital so many times over the years and I can remember how terrifing it can be. However, the Dr's need to rule out other conditions that could be causing the new symptoms. Even after a person is diagnosed with CRPS, it is important that when new Heath symptoms show up the Dr's rule out other serious illnesses as the root cause.
I think it sounds like you are on the right track and may benefit from going to the hospital. You probably should have been admitted a month ago since you need tests run and better pain management. Please keep the group posted and know that you are in my thoughts and prayers.
Sarah