The headaches occur due to a severe lack of oxygen transportation around your body and to the brain from a major amount of SN causing overwhelming Methemoglobinemia. A tiny amount of SN will never recreate the same kind of symptoms, instead you'll just end up feeling like crap probably for a while. Someone actually did test their SN putting some in a cap and swallowed. I believe it was bc it was opened for a while and they wanted to test if it still did anything. I hope that person sees and comments b/c they could recount the actual symptoms as I don't recall them right now, but it was just basically feeling bad for a while. But once again, the point of using SN is to overwhelm your system so it shuts down. What does it matter if you get a headache if in a few mins you'll be passing out and then you'll be dead? I'm sorry, not trying to be insensitive, but the way it affects you will have nothing to do with how the actual overdose feels.
