Many thanks FL, My headache has eased off after 8 days, just background now and no other issues. I woke up without a headache and could have cheered! Thanks for the info about the beta bloockers, I definately think it may be worth thinking about as I can't carry on like this. Like you I always had headaches around my period. I could predict when I'd get them and my mother had migraines which eased off almost completely post menopause. Since Ive been close to menopause they have gone haywire so don't know if it's hormones, posture, grinding / clenching.
