It could be possible that you might be having a structural defect somewhere from your kidneys to your urine outlet. This can sometimes cause changes in normal urine flow and can also damage the kidneys by scarring. The presence of rbc
further supports this.
It would be helpful if you can undergo imaging of your urinary tract
by Intavenous pyelogram
of kidneys and urinary tract for evidence of the same.
If this can be corrected, then your incidence of urinary tract infections will reduce.