Scan means what? Whether this is an mri scan or ct scan. I feel it would be mri scan only. See, tb gold interferon is a sensitive test but not 100% specific. It means that in few healthy patients this test may be positive. So don't worry. It does not need any treatment if your mri scan doesnot show tb. For further assistance, you may get cbc, esr,crph done. Now let's talk about your pain .if you have mild disc bulge then avoid back flexion exercise. Do back strengthening and back extension exercise only.