Im 16, around 50kg and around 170cm and i dont smoke. i spat out bloody phlegm around 3 hours ago, but i didnt cough it up. I didnt have any symptoms of pnuemonia or anything similar to that. I dont have any other lung cancer symptoms. And the blood to saliva+phlegm ratio was about 1:3. However i do have a habit of clearing my throat 3 times a minute, but ive never had bloody phlegm before, and this habit stayed with me for years now. Whats wrong with me???? i hope i dont have cancer :(