Hi Tressa and Welcome to HealingWell!
I think lizzy is right - continue to persue this with your neurologist and as you already have done once, by going to Duke and getting a second opinion that was a great thing to do - don't hesitate to try another!!
Perhaps you may have a combination of things going on.
I wish you the all the best and hope they are able to figure out what is going on soon!
"Because he is he and I am I."......E. V. Lucas