Dear Machell,
Bipolar Disorder is a biologically-based mood disorder, and a child with a family history of bipolar illness is more likely to develop the condition than is a child without such a family history. Having said that, it is by no means clear that your daughter's current behavior is a manifestation of an underlying mood disorder. In fact, the acute onset of such symptoms as your daughter is displaying argues against this possibility.
My first thought is that she is ill. Have you had her checked for possible strep infection, ear infection, sinus infection, etc.? Such illnesses often promote labile moods in children, even when they are not complaining of specific symptoms.
If she is medically healthy, check into the possibility of some acute stressor in her environment, either at home or in school. Have there been changes in her environment? Has her daily schedule been altered in any significant way? Have there been illnesses or deaths of family members, relatives, friends, neighbors? Has anyone close to her recently moved or been separated from her? Such changes can result in instability of the sort you are describing.
At a management level, is it necessary for you to be called from work when these episodes occur? It might be better to let them run their course without you having to be summoned.