Lynda, I'm afraid without medication, there is no real remedy for this particular type of migraine.
I think this is probably the only type of migraine that does not improve with age. Most hormonal type migraines disappear after the menopause and the type that men have from adolescence (my partner included) get better with age but sadly, the subtype of migraine that I (and probably you) have do not improve with age or without medication.
It's a real bummer but I'm going to be completely honest with you. Having put up with migraine auras for what is now 19 years, I can tell you that as far as I'm concerned (and obviously you could be different) absolutely nothing makes one iota of difference apart from good, hard, drugs ie HRT and ADs. All the healthy diets, plenty of exercise, healthy weight, no smoking, no alcohol, no stress, taking all the right supplements in the world makes zero difference to the frequency or severity of my migraines.
I used to get a horrible postdrome for 72 hours but since taking propranolol, I have no after effects at all. The propranolol was supposed to be a preventative medication but it didn't work for that.
I'm sorry I can't say something more positive but believe me, I have tried everything and my current regime is the best so far. I didn't have migraines during my reproductive years.