Pain dard in chest. Worried about that.

Hello Dr. I'm suffering from chest pain from january due to which i check myself to Physician he check my ecg, echo which is normal after one weak i check myself to orthopaedic he told me that's due to muscle strain after 15 days i check myself to our family doctor he told me that this is due to throat infection. last month i checked myself to pulmonologist he checked my chest x ray which is normal and told me that's should be due to stress and give me advice to start exercise after that My chest pain are gone but weakness is also there and there is some blackish particles in my phlegm due to which today i check my reports which are attached Can any Dr. plss give me proper guidance for better precautions I'm so much worried about that.