GM, thankyou for answering.
Yes my ovaries were removed. I have no particular craving or aversion to salt, but I never add salt to my food at the table, just a little in cooking and I do find some processed food too salty for my taste.
The aura of the migraine (the visual disturbances) I have had for maybe 20 years now. The headaches themselves only started about 5 years ago, maybe less, but the headaches really aren't bad, and often go just by themselves. They are usually better for sleep, or fresh air. Sound doesn't bother me but light does, and I find the visual disturbance leaves me feeling disorientated for several hours and can precipitate panic. Do you need to know any more ?