Is my daughter about to start?

im a mom of 8 almost 10 and my daughter is 12 well that is my oldest daughter i was around 9 when i got my period so i didnt thank about what happend before my period. My daughter has had discharge for about 2 years i cant tell when i do lanudry ! She got 2 years ago and i dont know about pubic hair because my daughter dont realy talk to me about that what child would ? has complained about her lower back and just resently got strong cramps and diarehha ? when will she start is it soon and she has been so rude one minute and not want to help me with her baby brothers then she is in the living room later snuggling with one on the couch!