Suggest Treatment For Nose Bleed Post Congestion And Cough

Hello, I ve got a cough for few days. It seems the mucus I poured out from neck and nose looks yellow or a bit reddish. I saw, deep Blood strains came out with cough while blowing the left nose for last two days. Sometimes they are much fresh than just a strain. It s a little odd into my left nose, but no significant pain there. However, today s morning it was jammed due to cough, so I blew a little harder and then more than a tea spoon of fresh blood came out suddenly from the left nostril. I am worried. It is important to say, I am a smoker. Should I stop smoking for few days?