What do you do when you get a migraine?

I mean a migraine that has the symptoms of dizziness,flashing lights,fog,headaches,blindness,and vomitting.What kind of things do you do to prevent them and end them.I want something that is totally approved by experts,doctors,and medical fields. Please give me valid information if you know. If you don't know or if you want to give random false info don't bother. I really need exact info on what to do to prevent and end a migraine. If you want to help thanks!!!!!!!