Missed period on pill

For the last 3 months I've been on the pill I've been getting my period during the last active week, and I didn't this week. I feel like it's just my period regulating but I've had minimal spotting and no other signs of a period. My period is 8 days late according to when I've had it the last 3 months.. Tomorrow will be the last active pill. Am I worrying to much? Or should I take a pregnancy test