Can you help me?

Brianna • 13years old in relationships with Chaz Hudson in love with him live with mom, step dad,sister,and brother. Im in 7th grade my bff is Mackinzie Griffin
I need some help I haven't started yet and the app wouldn't let me go on with out having to put something about how long my period last and how mang days I dont have my period and I dont know the symptoms can you tell me all the symptoms you can think of please