I think you should seek the care of a physician. I would recommend starting with your primary care doctor, who then can make the appropriate referrals if needed. The balance problem could be due to a problem in the ear or the brain, and this may need to be investigated. Regarding the muscle twitching, this may be related to or seperate from the dizzy issue. Good luck.
I just saw a neuro in Toronto for a second opinion. He can't understand my symptoms either as the Evoked Sensory Potential and EMG test that he understook were normal. He did send me for a Lyme test just to rule that one out.
I mentioned that all my problems seemed to happen after I had a viral infection and a rash around my waist that moved upwards to my chest, (2 1/2 years ago) He confirmed that viruses can indeed cause neurological symptoms but they don't understand why.
That is an interesting concept for other people with unexplained neurologocal symptoms.
The Canadian