I would think it best to see a medical practitioner if you really think the problem is adhd. However, imho, I would doubt this behaviour to be adhd. Because your child can behave herself when you are at other peoples places it seems to me that she chooses her behaviour when she feels safe to display it. In other words, it seems to me that children with adhd have a clinical condition that wouldn't allow a child to choose if and when the behaviour turned on. I think more likely she simply has "normal" behaviour issues. If you don't get enough advice to help on this site, I would recommend any of the books by Dr Christopher Green. He wrote toddler taming, beyond toddler taming, understanding adhd and heaps of others. In Australia he is considered a guru, and I think his books are available in US and Uk, or can be bought on line. There are heaps of other good books in most librarys, but I still think his are the best.