Took BP after Migraine Aura (with no headache)after lunch165/81.Can migraine with an Aura only cause spike in BP? Have normal BP even with Migraine Aura

It could. ...just the anxiety about possibly getting a migraine if you have bad ones. However, you have a rather complicated history and are on some things which should help control your blood pressure. Keep checking it, and if it is staying up (or going up) probably should be seen given your history. By the way, you can always take more Magnesium, bisglycinate better than citrate. Helps both concerns.