Hi Branflake,
Just a thought because of the time of your attacks and common misdiagnosis, do you know about Chronic Cluster Headaches?
Often striking the same time every day/night, waking sufferer up, worst possible stabbing/boring/white hot pain on one side of head. Often makes one eye water, nose block and run.
Whatever the cause, I sincerely hope you find a resolution very soon, my Cluster Headache attacks have increased again this past 6 weeks to 1-3 every day and it is difficult to manage. Know that you are not alone.

Dave.