How long until feeling sick after smoking a cig goes away?

Yeah I know it's stupid but I tried a cigarette like an hour ago and I threw up then, how long until feeling sick goes away since then i have eaten sugar(supposed to help make it go away) 2 gles of milk and a bowl of rice krispies... I WILL NEVER SMOKE AGAIN IT'S SO NASTY! I just wana know how long until I feel normal again I feel nausea and kind of a head ache