Thanks for your question at DoctorSpring.com.
Most of the diseases of abdomen are diagnosed by Ultrasound abdomen,CT scan abdomen. All these tests are normal.
As you had previous history of surgery(Hysterectomy),the commonest cause for pain could be adhesions. This will not be diagnosed by any tests.
You can consult your Surgeon and plan for Diagnostic laparoscopy(key hole procedure).If adhesions are seen,they can be lysed at the same sitting.
Blood in urine can be due to infection,stone etc.please drink plenty of liquids.
Hope this helps. Please feel free to discuss further.