David:   Did you ever see a headache specialist about your nocturnal headaches, and if so, were you treated with something that helped?   My hypnic headaches are no longer responding to my preventative (Indomethacin SR) and I was just prescribed lithium (low dose).  It takes a while for it to build up in the blood enough to become helpful, but I am trying to find anyone with hypnic headaches who has taken lithium as a preventative.   I was also diagnosed with nocturnal cluster headaches, and was told that the lithium could help both.  I am not recommending these to you (because only a physician can do that for each particular case) but I am writing in hopes that either you or Becki read this and can provide any experience in treating hypnic headaches.  I hope you are feeling better these days. Clemmie