Suma is right, headache/migraine can cause what you describe too - but we are not docs and sure can only give you our best based on our knowledge set.
I can say that I can relate to the memory
issues, loss of words, balance and speech
issues But, so many diseases and syndromes have overlapping symptoms. I cannot relate to the night issues, hallucinations, etc.
I hope the new neuro serves you well, and that your PCP plays an active role in your care.