When I have a migraine coming, and often during, I have an unshakable desire for sleep, and I will go into the weirdest sleep where I am vaguely aware of what is going on around me, but otherwise I'm in a sleep/coma. I've searched and searched, but I haven't heard anyone else talk about it. It happens whether or not I've had any medications. I've often thought it is my brain just shutting down because of the pain/ pressure/synaptic overload. It lasts for several hours and repeats throughout the migraine. Any ideas?