I also have the same problem when lying down.  I used relpax for a year and ran out of my 14 pills every month. I then decided i did not want to be on drugs anymore and kept searching for the reason WHY I get migraines in the first place. I had daily migraines for app 3 years.  I love ranch dressing, chinese food and  mocha frappachinos from Starbucks.  I found this book HEAL YOUR HEADACHE THE 123 PROGRAM by David Bucholz, M.D.  He explains how MSG is the root cause of triggering our migraines.  It is hard and I am not faithful in eleminating everything but when I throw my chinese food back in I am usually doomed the next day. I call them couch days beacuase its easier than lying down in bed. I still lay down almost every nite and after 5 to 10 min have a headache but when I get up in the am I can usually bring that down to a 1 or 2 just by being up.  I recommend the book as a sterting point for EVERYONE.    It has changed my life I have not seen a Dr in 5 months I was having to get a demerol shot app every 6 weeks with a preventitive and relpax.  I am on no drugs just staying away from my enemies  F O O D!!!!!!