Hi Toepick, do you think you might be having a cluster headache?
I don't know. I have had 4 separate headaches in 10 days. And I have never had a headache this bad in my life. But I never had any vision issues or sensitivity to light or noise.
I developed cluster headaches when I was pregnant and I ended up in the ER a few times too. It started out same as your and I later developed sensitivity to light and sounds, which exacerbated the headaches but never triggered them. The only way they could abort the headaches was to put me on oxygen at a high flow rate (12+ liters per minute) with a rebreather mask. Pay attention to when the headaches occur, if they start around the same time every time then it is most probably a cluster. They are also associated with season changes, ie summer to fall like right now.