The mother of a friend of mine worked as a sales rep and was often caught by migraines when too far from home to drive home safely.
She would lock her car doors, put on her sleep mask and cover herself with a duvet and place a sign in the car window advising that she was having a migraine, and should be left to sleep it off.
I have had two in my life - the first generated by the sheer excitement of a Bruce Springsteen concert!
Driving the sixty miles home, I realised that oncoming car lights were hurting me eyes. Mt wife took over driving, as the symptoms increased. By the time we got home, i couldn;t walk, and I really did think I was going to die.
Slept it off, but i was seriously frightened.