I know it's hard to see the positives when you are mired in the negatives. It sounds like there are some power struggles going on here which aren't uncommon with ADD and ODD...or kids in general. (Been there, done that!) But there are certainly positives with ADD and Aspergers. They are tough, though, because social cues get missed...a lot.
Dr. Edward Hallowell has several books that help a person see the positives and not just the negatives of ADD/ADHD. He's got it himself and his book Driven to Distraction helped me to see that ADD/ADHD is not all negative. His headquarters are in Sudbury, MA, not far from Marlborough. You might want to check them out.
Our 14 y.o. son is borderline ADD--not the hyper type, but the dreamy, spacey type. It's enough to be disruptive, but not enough for him to officially be diagnosed with it...so far.
One thing I've been told is that it is not uncommon for school to get harder as time goes on. I've noticed that to be true, over the last year especially. Time will tell if our son is able to turn around his school experience to a more positive path. He'll be starting high school next year and it will be a fresh start. (He's not a problem kid, but friendships are sometimes hard and homework is perpetually a struggle.)
If you can get yourself out of the punishment mode and into catching her when she does things right, that might be helpful. Her hiding things and stealing things, seems like she's seeing what her limits are, what she can get away with. Although it's negative attention, it's at least attention. It's sometimes hard for me to remember to emphasize the positives, but catching your kid when they're doing something right is a powerful thing for you and for your kid. It's worth it's weight in gold.
I'm reading a book right now that is hitting me right where I'm at. It's called Gift of an Ordinary Day by Katrina Kenison. She helps me to see the positives in the midst of the negatives; to find the strengths within her child to help him blossom. Her oldest child, the one with various diagnoses, is in college now, I believe. The book chronicles her progress with her boys as they navigated school and personal challenges.
It might be helpful to read this book to see things through another lens. I'm halfway through the book and am loving it! It's helping me to think about what our son is good at, where he excels, things he truly enjoys. Tapping into those strengths may help you get past this stage. No kid is all bad. There has to be something that is positive about her. So, take the time to think of those positives.
Don't we all wish we had crystal balls? I sure do. But maybe it's better to live in the moment and not get too carried away with the what-ifs, and catastrophizing, which is so easy to do when we're worried about our baby bears.
Best of luck and stay by her side. If you can think of yourself as her best advocate and not just her police chief, you might get further with her.
BTW--Aspergers isn't out of the question as a diagnosis. A friend of our son has a history of doing odd things, pushing limits, coming off negatively in social settings...all of which are signs of his version of Aspergers.
Good luck! : )
P.S. Sometimes the negative emotional outcome of ADD/ADHD, Aspergers, etc. is to lash out at those around you, to get angry at not being understood. Once the actual symptoms are addressed and understood correctly, it may be that your daughter will settle down.
My experience is that puberty does wonders for leveling out behavior. It may sound counterintuitive, but it can actually help sometimes. I'm not saying it's easy. The teen years are a challenge. Letting go while still applying appropriate bounds is a never-ending, always-adjusting dance. But I've found I can talk with our son more about some of these things than I could before. The trick is to not overtalk it (my biggest offense).