Af showed up

Brittany

So af showed up so I am out this month but my question is I started around 9:00 pm and I wouldn’t call it spotting it’s not a heavy flow but more then just spotting but what’s confusing to me is the last two cycles before this it was just spotting the first day.So I am trying to record it for my ovulation days but some months my cycle is 27 days and some are 28 days is this normal and what do I count as the first day of my period.HELP please