I have migraines all my adult life. The experience has always been the same. First a deterioration of vision followed by wavy lines gradually moving out to the side. All over in about 20/30 mins. No bad headache. After a headache when coughing only. For 4 days I have had what feels like a migraine starting but never developing. Vision impaired then improving though out the day. Starting to worry me now that it’s not a migraine but something more sinister. Had anybody else had this?