Sputum without Cough

Hello all i started off few days back with pain in my throat and headaches everytime i turned my head and kept bringing out hard sputum with some blood in it, the headaches and pain has resolved completely without any medication but im still letting out hard sputum with some blood for days now....im 23 years old a mild smoker, smoke around a pack a day.....id like to know should i take this matter seriously, or the sputum thing would resolve on its own...i have no difficulty breathing no pain only the sputum production that has continued now for days....any advice and kind words would be helpful thank you