Chronic lumbar back pain mri normal, high wbc 15.1, lymphocytes, and neutrophils high. s.aureus in nose, boils in groin. what's going on? what next?

Time to follow up: Hopefully you have an follow-up scheduled. If you have a fever, you are going to need to go to the hospital instead of waiting.

Can be many things,,: There are many possibilities here. There might be a straight-forward infection causing high WBC and neutrophils with a nasal infection, and/or there may be a viral issue like a cold which could explain the high lymphocytes. The groin issue could mean a venereal disease, like chlamydia or a local infection, or there might be a blood disease like leukemia. More tests (blood smear) may be needed.