All three of my teens have been diagnosed (by a psychiatrist) with bipolar disorder, two with bipolar I, and one NOS. I don't disagree with the diagnoses but I am confused as to why three out of three would have it if neither parent has been diagnosed. Does this mean one or both parents most probably have it? is it normal for all kids to have it if it runs in the family, or are we just unfortunate? And yes, I am exhausted!