Chest pain following a months long cough

I went for a swim in a public pool one day.  A week later, I got a cough. The worst cough of my life. I would cough 24×7 and very intensely. It transmitted to everyone in my family. I had to drink 10 to 15 bottles of cough syrup. After coughing for a month, I coughed up trace amounts of blood one day. Went to a pulmonologist and he did a CT scan.  Doctor said it wasn't TB or Pneumonia but upper respiratory tract infection and prescribed  medicine which were antibiotics, blood clotting agents etc, it took me another 1.5  months to get rid of the cough. All in all cough stayed for like 2 months. But it's been 5 months or so since the cough started and I still feel chest pain. And not just chest pain, it feels as if the pain is coming from inside the lungs. I don't have any other symptoms. Sometimes when I try to breathe deep it hurts, sometimes my chest hurts upon pressing. And now there is no cough or blood. What's wrong? Costochondritis or Pleurisy? Do I get chest x-ray or Sputum test?