Period question???

Maddie

What does it mean when I start my period 2 days late and then I spot the day after a little that day and the tiniest bit the day after that and then just nothing. I never fully had a period….normally my period is always right on time and always lasts 3-4 days and ends when it’s supposed to. This happened last week. I don’t feel pregnant or anything ..so I’m just confused.??? Help