At least they've scheduled the MRI!

Ugh. I wish the neuro would have 'held back' the stress comment.

Even if that's what the neuro thinks, it isn't something they should say - it sets a funky tone for your relationship from the git-go. Expressing any frustration over the fact they said though could result in them taking you even less seriously. Unfair as it is, ditching a doc at the first sign of disagreement doesn't look good either. Your medical history travels with you to some degree.
I'd chalk it up to bad 'bedside' manner and (if you can) leave it that for now. Get a second opinion after this one has given it a fair shot.