Blood sometimes when coughing. As well.

In the 1st week of January 2021 i coughed and saw a tinge of blood along with it. This continued for a couple of days and i visited the doctor. He gave me a couple of meds. Pause 500 and Joycin. It worked. But since the past few days it has started again. I always have the urge to spit and feels like there is cough at the back of my throat. Slight tightness in chest at times but that goes away with burping. I was also advised tests like platelet and bt ct and fasting. Which all came back normal. Was also advised xray chest (pa) and xray pns (om) which was okay as well. The doctor said one side of my nose inside has  increased. DNS TO LEFT he said. I also have a dry mouth . I feel like drinking water all the time. The bloody sputum is there in the morning when i cough after i wake up. And its sometimes once in a few days. I dont have any major issues other than this. I do not smoke or drink at all. Am involved in sports as well. Thanking you in advance for your help.