First the good news I have been smoke free for 48 hours!! The first time in 25 years. I think I am getting to much nicotine from my njoy prefilled cartridges. My mind is foggy-I feel funny- jittery- my head feels strange. I do not feel that this has anything to do with withdraw symptoms. I have ordered the ultra light cartridges but it will take 4-6 days receive them. Is there any way I can do somehting to decrease the nicotine in the few cartridges that I have. I really do not want to go back to smoking. Thanks for any help you can offer.