Only her treating physician after taking,examining and after review of her most recent lab work can determine when dialysis need to be imitated.
Delaying dialysis can cause muscle weakness and cognitive function (thinking,confusion)to get slow done.
First, you should see your family doctor who can run urine test and blood test to see if there is concern of bladder infection or kidney injury is the cause. Imaging like kidney US or CT scan of kidney can exclude kidney stone or kidney tumor or cyst. For bladder issue, a urologist may recommend cystoscopy, looking inside the bladder by scope.
I hope it helps to clarify your questions.
Your healthcare provider can differentiate a bladder infection from a kidney infection and can treat you optimally so that it does not flare up and result in complications.
I hope the above answered your questions,if you need additional clarification, then do elaborate on additional concerns or questions.