well dont for getting to day 4 - and doing it cold turkey. ur probably feeling high and excited because ur body wants nicotine which u haven't had today! Some people may react badly to it, or like u react by being excited - its can affect people is different ways.
Just keep it up m8y, try not to be bored - keep urself busy and u will be ok.
I remember that feeling, albeit while I was on lozenges. It may well be adrenaline, it certainly feels quite like it, but you are also excited that you are undertaking something that you have wanted to do for a while and succeeding!
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