I Was Heavy Smoker For A Few Years Quit 16

I was heavy smoker for a few years quit 16 hours ago was just wondering how long does it take for nicotine and continine To stay in the blood stream
I am 21 btw
I work out and drink lots of water and eat healthy just was wondering is there is anything else I can do to flush nicotine and continine out so let's say if I went in got a blood test these elements would be gone