I'm confused...if you where a smoker before and vaped for 4 months........dont have any of the basic Nic over dose signs........ what in the world is making you think its Nicotine?
I agree 100% This thread makes less and less sense every time he posts, lol. Not trying to be mean OP, but this doesn't seem ANYTHING like nicotine poisoning. In fact, if you were vaping for 4 months before with no problem, and you are only at 12mg/mL, I can guarantee you, it ISNT nicotine poisoning.
Your body is an extremely delicate and complex vehicle. There are tens of thousands of biological processes going on every second, and just as many things that can go wrong, on the microscopic level.
Nicotine poisoning, as far as I know, its a syndrome, or "condition". If you have had these issues for a month now, it isn't nicotine poisoning. It would be like any other drug over dose.....you don't have have a drug overdose that lasts a month....it just doesn't work like that.
Just cut back on the vaping, see how you feel man. =) Get yourself to a doctor too.