I'm 20 years old and I'm not too sure if the way she acts is because of bipolar or because she's just a very defiant teenager. I've been symptomatic since I was 13 but I did not behave in this sort of way. In fact, my parents had a problem with the fact I'd isolate so frequently during my depressive episodes. My brother on the other hand acts very similar to the way you are describing your daughter, and he is not diagnosed with bipolar. He's currently 18 and can barely graduate from high school as well. He is the definition of defiant! Some teenagers end up this way. I'm really sorry that she is giving you so much stress and I hope that you manage to find a way to help her. Are you strict with the rules you place on her? Our father is very passive and did not enforce any of his rules on my brother and I after our mom left, so he learned from an early age that he was able to get away with pretty much whatever he wanted.