Granuloma in the lungs

Hi! im 25 years old and currently working in a hospital. I had my annual physical examination and my chest x-ray shows I have granuloma and ct scan of the chest confirmed it.. my doctors wants to check my previous chest x-ray to check if I had it before and might have been overlook before,is it possible i acquired it from my patients?Is there any treatment for this, i have plan to work to other countries will this affect my medical examination?Is it also contagious to other people i talk or mingle with? I'm confuse and scared right now?I hope you could give me answers..