The neurologist will probably wonder why you are there to see him, also.
He will probably talk with you for awhile and perform a simple neurological exam. If he feels there is a problem that needs to be pursued, he will probably order some imaging, like an MRI. There is nothing to worry about.
Why did you make the appointment? Have you had ongoing problems with your back? Sounds like your problem has cleared up on his own. If you are sensible in how you treat your back, you may be able to avoid future back problems. Wouldn't that be nice??