Greetings from healthcaremagic.com
I am Dr Sourav Chakraborty and i will be helping you with your query.
Tuberculosis of the lung is one of the dangerous any one could have , but it is easily curable too.
From your history your chest x ray
is suggestive of minimal pulmonary tuberculosis
and it needs urgent attention irrelevant of whether if you have or have not suffered from tuberculosis earlier.
Please get your sputum checked for acid fast bacilli and a Mantoux test
or consult a chest physician for further evaluation clinically.
If after your clinical and further evaluation , your doctor declare you medical fit , you can resume your job.
Hope i have been to help you.