Is this really a migraine?

I was referred to a neurologist by my PCP because I have been presenting with near daily throbbing headaches in the back of my head on both sides, black spots in vision that clears between throbs, fatigue and mild memory loss for about a month now, specifically when I walk up flights of stairs or am abruptly woken in the morning by something. I went to the neurologist today expecting an MRI as my PCP had recommended, but all they did was have me walk around the room, shine a light in my eyes and ask me if I coul feel both sides of my body, then told me I had migraines and prescribed me vitamin supplements. I've had migraines in the past but they are always one-sided, in the front, and don't present with much pain. It just seems completely different from what I've come to understand as migraines for myself, and I'm a little confused by the diagnosis. I will start the vitimins soon and hopefully see an improvment, but does this sound like a normal migraine?