Hi Doc..we Have A Annual Medical Checkup Tommorow..what Can I

Hi doc..we have a annual medical checkup tommorow..what can i do to make sure tha i'll get a clear result to my chest xray..b'coz i feel a beat of pain in my back thats why im worried that i should failed my xray result and ill be lost my job..can you give me an advise doc or tips before i go in xray checkup?tnx..