Hello doctor! Recently, I have signs of pain in the chest area and sharp pain in the back that does not go away. I went to the provincial hospitals and tuberculosis, the doctor said there was no problem, but I felt pain about it. I don't know if I have a lung problem?

Recently, I have had a dull ache in my chest. Initially the pain was in the middle of the chest, but now it is only on the left side of the chest. When I breathe hard and move vigorously, it hurts more. Doctor tell me what is the pain in the left chest every time I exercise vigorously?