Is This Normal? I Am 14 Years Old And A

Is this normal? I am 14 years old and a virgin. My period came two days late, the color at the beginning was a deep brown, the second day, I blessed almost normally except there was less blood than usual, the last day the blood turned back to a brownish color. So, in total in lasted three days. Something about my period seemed off. It was a bit shorter than my normal 4 days, it was 3... And the colors at the beginning and end were weird. My mom insists I'm fine, but I would like to double check.