Occasional Smoking, Bleeding On Brushing The Teeth. Had Chest Discomfort. Cause?

hello, im 19 an occasional smoker mainly on weekends for about a year, and this past weekend i spit a good amount of blood while brushing my teeth but it felt like it came from nose , the night before i had also stayed in a cold dry hotel room, since then ive had some discomfort in my chest, but havnt spit blood since then. i also dont have a cough or spit phlegm . going to get checked tomorrow at the doctor.