My headache lasted until 4am when I threw up. Then I was able to sleep.
I woke up fine, but shortly after waking up I rapidly became nauseous, threw up the second time and the headache came back in force. Thankfully this time the headache seemed to taper off after about two hours and then I was fine.
I still kind of think it was something else (bad food, bad weed, i dont know...), but I've never had such a terrible headache before.