I am sorry you are going through this. I know it is hard to figure out what is connected to the RSD and not. Also that doctors don't make connections either though it sounds like the one you saw is trying to. I have a friend with RSD who has heart problems and high b/p though has had times where it was low. She feels this is all connected to her RSD. I know you stated that one med but are you on any other meds that may be impacting your B/P etc?
Hope you get some answers and relief.