I have suffered with cluster migraines for years.
I have the same symptoms as you. If I sleep for more than 6 hrs...I wake up with BAD migraines. I have very low BP (I am guessing due to this)????
I went on a drug called topomax for 6 mos and NO MORE headaches.
I went off the meds and within 6-8 mos the migraines came back accompanied by the very low BP.
I am back to step 1
Going back on 25mg topomax (anti seizure type med) starting tomorrow.
Can't handle the lack of quality of life. Thanks for sharing...as I know I am not alone.
Donna from Canada (49 yrs old) had this condition for 20 yrs.
Most of my migraines are when I wake up in the morning or I am woken in the night with them.
So they are by no means a classical migraine.
I think there are different causes and that they are just symptoms of another problem.
I am usually very tired on going to sleep so maybe... a heart problem?