I had a lumbar puncture to rule out meningitis as an illness after my doctor sent me to the ER. I spent 4 days in the hospital on IV antibiotics treating multiple sinusitis. I was hospitalized because my lack of spleen has made me immunocompromised. Anyway, I had a LP done in the ER on Nov. 8 and I experienced back pain and headaches but the back pain had grown worse and down into my tailbone. Nearly 6 days later I'm having bad pain. Is this normal?