This is Dr Basu, experienced Internal Medicine Specialist.
I am here to address your concerns and provide great service.
That is concerning.
Persistent back pain radiating to right side can be due to the diverticulitis or inflammation of the intestine.
Change in stool consistency suggests that.
Kidney stone is another possibility.
Kidney stone related inflammation can affect the surrounding intestine as well.
Next possibility can be ruptured ovarian cyst --can be very painful for some time.
Lumbar spine radiculopathy is another important cause. Pain can persist due to the nerve compression at herniated disc.
You should consider getting a CT scan with contrast first to rule out all the above causes.
This can be done in a ED or can be arranged by your doctor soon.
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