Talk to Gynecologist on Prolonged Periods

Salam, my daughter is 12 years old She started her periods when she was 10 years old. She has never missed her periods in these two years. Initially she got periods twices as well in a month. Overall, her periods end in 7-8 days. Is this normal for girls innthe starting years? Also, her last periods lasted for two weeks, she kept getting small of bleeding,not spotting but bleeding. Now she has gotten her periods again. Last month she had them on 27th Nov and now this month she had them today, is this cycle normal for her? Teo months back, her cycle was 16 days long. Im worried, i dont know if this is ok for her age or not. Should i get some tests done for her?