Over the last 3-4 years, i've had intermittent "thunderclap" headaches of unknown orgin. They were diagnosed as this, but with no known cause. I've had a few MRI's, CT scans, and even tested for a pheo. The most peculiar is it only happens in the very early am (like 4:00), and actuallly wakes me up. I feel this huge rush like feeling coming from the middle of my body, up into my head, and then "bam", and explosion unlike any other. The first time it happened, the medics came and my BP was through the roof (likely due to the pain). They last 20-30 minutes (not long enough for meds to kick-in), and all i can do is grab the top of my head and push really hard to press against the pain (similar to putting pressre against a cut to keep it from hurting so bad), and take 2 aleve to control the lingering headache that comes afterward.
I recently was told it could be a result in a rise of cortisol. I only get them a few times/year (last one was Aug, but i wasn't sure i was going to live through it that time....i know they can actually be fatal).
Has anyone ever had this before?