Thanks Perna, that's a good spot. (No pun intended.) lol

Sunshine, you don't have to have an aura or prodrome to "prove" it's a migraine. And there are even "no pain" migraines, if you can believe that...where the body still suffers and needs medication. If your head ache was more of a band around your head, or coming up from your neck, it might not have been a migraine though.

about the technical... though it may reflec how you have your computer settings for when you scroll, telling it what to do with the font/type/text, and an optical illusion only.