Is It Normal To Have Heavy And Painful Watery Blood Discharge During Periods?

Hi, I have a daughter she will be 12 years old at the end of this month. She had her first period at the end of December, it last 7 days, then she had the next one at the end of january with cramps and it was heavy for 7 days. She didn't have one on march but she has one again in March, it was very heavy and painful and also last 7 days, one week later she started with a brown secretion that last 3 days and it became in a discharge of watery blood. Please let me know if this is normal.

Rachel