Yes it is possible to get a lung infection, feel better, and then have a recurrence of symptoms. I recommend that you do see your doctor regarding this. Have a repeat chest xray and sputum cultures, etc. I don't think you need a spinal tap at this time unless you are having symptoms of meningitis such as headache, stiff neck, confusion fever
If you have any further questions please ask. If no further questions, please click accept.