FYI, I went to the neurologist and the brain MRI came back normal, so I don't have MS.  What I do have is an over-active nervous system, as well as hyperventilation syndrome.  Apparently, I've been subconsciously hyperventilating when responding to stress (I received some bad/anxious news from my mother regarding her health prior to all of this happening).  The hyperventilation had changed the PH of my blood and caused all of the tingling and numbness.      I still don't know whether the GERD is related to all of this, but I'm still trying to deal with the symptoms.  They've definitely improved since I received the diagnosis.  Sometimes not knowing is the worst part of having weird symptoms!  Especially since anxiety was causing half of this in the first place.  Best of luck to you all.