I have moderate amount of free fluid in pelvis, severe back pain, positive cervix culture with enterococcus. feels like a pelvic infection to me. how do i test the pelvic fluid? who does that? how do i test the spine for infection and who does that?

Please contact your gynecologist for guidance. To get a sample of pelvic fluid would require a needle be place in the area and a sample drawn, the same for a suspicious area in/near the spine. None of this would be routine and a thorough evaluation by your gynecologist could guide what if any additional testing needs to be done or if treatment could be started based on existing data.