I sometimes get a 'zap' behind my ear - like there's a spark between my ear and neck.
Not often, but it's there.

I've had head shooting pains for a long time (way before other sx's started) but I guess that's different to zaps.

It's interesting that your neuro told you the MRI would be unlikely to show changes any sooner than 2 years.
My neuro on the otherhand says if I had MS it would've shown up by now in the 2 MRI's I've had (first one (head) was 5 and a half months ago). I had a spine MRI in August.
Like you said Ruth, I know we're not Dr's, but it sounds too assumptive (is that the right word?!)