Hi Danielle,
Are there any other symptoms? Fever? Changes of any other kind? Does the pain travel from one place to another? You mentioned pain in the lower back AND near her left ovary...could it be the pain is travelling from her kidney (back) to down the ureter tube(passes by the ovary) to the bladder? Berberis comes to mind, but please don't give this unless one of the qualified homeopaths say they agree!! I'm only a student, still.

In the meantime, lots of cranberry juice, Vit C (500 - 1000 per day should be enough) and make sure she goes when the urge hits to ensure she is indeed emptying her bladder.

>>>The Vit C is ONLY to be used in cases of (UTI's) regular old Urinary Tract Infections as opposed to bonafide Kidney troubles. So, if she has no history of renal troubles/impairment, the Vit C is OKAY. Otherwise, do not advise Vit C.

Lots of water, but you and she probably already know that . Lay light on spicy, oily foods (that helps) and hopefully one of the qualified homeopaths will help you out with a remedy.

Hope someone responds soon and she feels better soon!
Take care,
Lisa