Well, spoke to my neurologist and he said very simply, oh, that's an aura from a migraine. I said, but I didn't have a migraine; I had a headache earlier and it was gone. He said, that's just an aura with a migraine that has no pain; nothing to worry about
. He did say if I started having them regularly, but that I'd had a CT scan in the past 5 years and things looked good, so he wasn't concerned.
I guess I'm supposed to relax now, right?
The giant piece of pizza did calm me down temporarily.