How to track period? Go since day 1 of spotting or go by day you see heavy blood?


I'm confused as this month just made me almost have a heart attack, I thought I was Prego!! Apparently I now spot for about 3 days and thennnn get a heavy period for 3-4 days. So how should I track this?? Track day 1, 2 & 3 of spotting as if it's the day I got my period? Or track from the 3rd day on which is when I begin my actual heavy period. Pls help!