Does the spinning dizziness occur for spinning in either direction or just one direction? Mine is only if I spin 180° fast to the left, but not right spin.
Good luck with your MRI in May. Given that you had symptoms for three years, like me, I suspect your growth rate is small or non-existent, like me.
I'm glad your neurosurgeon has you on watch and wait. A very responsible, at least initially, response.