Sending a hug from 'across the ditch'

What is the reason for your 'essential tremor' - has that been investigated, and have you had an MRI?

As Ann said, MS diagnosis is a process of excluding other diseases, have a look at the McDonald Criteria, and go to the MS Society of New Zealand website and have a look:

www.msnz.org.nz

I hope this helps, and good luck in finding out what is going on.