I was referred to a neurologist by my gp after my right eyelid started to droop sometimes, and then the pupil in that eye dilated for about an hour and a half one evening. I had an MRI done and the neurologist said that the MRI was normal, but ordered an MRA. They told me that the MRA revealed a "very small irregularity at the tip of my basilar artery", and they have referred me to a neurosurgeon. I can't get into the neurosurgeon for another 10 days, and I am worried sick! What does this MRA finding mean? I am so scared I can't even sleep.