Dear friend, welcome to HCM.
have they considered a pelvic injury/ urethral/ bladder contusion/ injury?
blood in urine (unless from menses mixed in urine ) and bed wetting
, back spasm, all also suggest possible urinary tract injury
what Xray have they done? pelvis/ both hips also or spine Xray?
may miss blunt bladder/ urethral injury
pl. insist on a urology consult to rule out the urinary tract injury, if you re sure she is not menstruating.
take care and keep me posted on your progress.
Good luck !