Unable to gather courage! Causes cancer?

I have been dealing with phlegm and constant throat clearing since a month. Pulmonologist has suggested me for an xray but due to the fear of TB/Cancer i am unable to get my courage and go for it. I am delaying it in the hope that it gets better automatically but its not. I have coughed phlegm with streak of blood twice once due to coughing forcefully, and once today where i was not coughing but clearing the throat. I am so scared. Please guide me. I am not a smoker nor any bad habits like tobacco or beetel! I don't have fever or night sweats. What is the risk of having TB or cancer at my age? And i heard tb medications itself causes cancer? Please guide me doctors. I need your reassurances and guidance