Zyban kicked in day 9

My quit day was Monday 11th august but i woke up yesterday morning and i decided to try not to simply have my favourite smoke of the day..when i wake up.  so i drank my coffe and i got thru it. than i was busy with kids ect. by lunch time still nothing. obviously the Zyban had kicked in faster than i thought. it was only day 9. I decided to go and join a gym and a reward for not smoking and changing my lifestyle. very excited