Welcome Jess!
It's great that you have your records as that will make it easier for you and your doctors. I'm glad you have a supportive doctor who listens and believes you. That is so important.
I hope the appointment with neuro #4 goes well for you and you get the answers you need. Have you been following up with a rheumatologist as well? That is important too as you may have some sort of rheumatic disease that's causing some of your issues.
Hang in there and let us know how your appointment goes.