If your daughter has had kidney pain for some time im assuming tests have already been carried out to ensure its nothing physical? Abuse can happen without parents having a clue so i understand it must have been quite a shock. I would ask your daughter to call up his office and ask for another round of testing to definately rule out something physical. Next i would sit down with your daughter and explain that if theres anything she has long been upset about something and needs to discuss it you are there for her - bringing up the topic outright might not be such a good idea for now. If you're concerned about how best to talk to her call your doctor and see if they can give you advice. Definately make sure that she see's a pyschiatrist for her depression and hopefully any stuff from the past will also be dealt with. I hope ive been of some help and more importantly i hope this situation improves for both your daughter and you. All the best.