Possible causes of low back pain, micro blood in urine in healthy, 32 y/o non-smoking woman? Had CT of kidnys and it was normal. Meds for inf not work.

Hematuria. Your hematuria (h) does not seem to be due to a lesion in your kidneys. Do you have a urinary tract infection (uti)? Your statement, "meds for not not work work", implies that you may have one. If you have no uti, you may need a cystoscopy to see if your bladder is the source of your h. A urologist can do this test. If negative, you may have a glomerulonephritis causing your h, see a nephrologist.