My period has been really short

Kayla • Just trying to track my body here on the average and get myself back to normal somewhat!
Okay so last month my period only lasted a whole three days. I was confused. Because me I am a heavy bleeder have been my whole life! This month it happen as well. It just stopped I barely made it to three days as well! I don't know why. Nothing has changed. My normal period usually is 6-10 days... An to go to half that is kind of odd... I'm not even getting my acne like normal... And ideas? Or is this normal?