Hi, Doctor, I`m 26 year old male, i was a normal guy till 2011 but from February 2011 till November 2012 i started consuming Alcohol and Smoking cigarette but now i realized and i`v quit all those, my question is am i prone to cancer or any deadly disease? because i get sudden headaches , heavy cough n cold now, my weight is not increasing (presentlly 50 k.g, height 5 6 )