Dear Ashley and All,
Most of you know that I don't have children, so when I reply it is "usually" from my own experiences, and sometimes the children that had been in my care - today is no different.
Let me start with a question - Do any of you remember ('cause I haven't seen any lately) the condiment boxes of sugar cubes that could be found in just about every office for coffee and tea drinkers? If so, then you will understand my next bit of information, for those who do not, it is a rectangular box which holds / held approximately 20 miniature sugar cubes to help sweeten what ever beverage was available near them. Most children could not handle eating more than two before they were bouncing off the walls or ready to fall asleep - depending on how their Kidney's processed sugar substances. Before you ask how does this relate... I was one of those children that at age five (5) was still wetting the bed every now and again - not always, and we could not go on long family outings without having to stop almost every hour so I could use a bathroom or similar there off. My parents tried grounding me, lecturing me, not giving me anything to eat/drink an hour before bedtime, standing at the bathroom door to make sure I used the facility before bed, waking me up in the middle of the night to make sure I tried again before morning, and I still could not get my bladder to stop relieving itself when ever it felt the need to. Finally one day my mom was talking to my pediatrician who didn't quite believe what she was saying so she brought me in for a "check-up", he had a specialist friend of his in the office, and after the "Okay" from mom, I proceeded to eat a whole box of the sugar cubes - not all at once, but during the time that they were questioning my mom about my eating habits, what I usually drank, how active I was, and how often my "wetting" was occurring. Since it wasn't all of the time, they knew it could not be an infection of my bladder nor my Kidneys, but the specialist had an idea of what it could be, and needed both my parents to bring me in for a meeting, a physical, and some x-rays. A week later I was scheduled for surgery. All the tests proved the specialists hunch, my Kidney tubes did not form correctly - at least they did not form in the proper place that most Kidney's do. Imagine and upside down and crossed pair of horse-shoes where your Kidney tubes are suppose to be... and that's what I had. They fixed the issue and a week later I was better than my old self. Could this be your daughter's issue? I don't know. Now comes part two. You mentioned your daughter is ADD / ADHD (sorry didn't quote you) - one of the ten (10) year old boys I use to care for was ADHD, and he even at age ten (10) still had occasional wetting issues (bed, bus, class, etc). His dad (mild ADHD) was always frustrated because he tried a lot of the same procedure stuff that my parents did with me (minus the lecturing and specialist part). We all did manage to get the wetting under control, but it came from the child's immediate community support (his dad and g-friends families, my husband and I, and the school he was attending)... we all made an effort to always keep his mind focused on what he had to do and when - essentially we had to keep him on a type of routine, and accept that when he said he needed to go - he wasn't being a goofy boy. We all also monitored his diet - things that could interact with the ADHD meds (like soda and certain candies), and some family members made a bigger effort to wake him in the middle of the night when ever he was in their care. Will this help your daughter's situation? I don't know, but they are other insights on ways that could assist in resolving your daughters complication for staying dry. It could also be a medical interaction issue, as you mentioned your daughter has some other health concerns as well.
I will be praying for your mystery to be solved before anymore health issues can occur, and that peace will surely find its way to you and yours (everyone).