Need some advice

So AF is ALWAYS on time & regular well this month I was 2 days late & it's not normal it's very light & I'm not really having any cramps when normally my cramps are so severe I can barely walk. My boobs are incredibly sore to the touch & very tender when normally they're sore until I start then everything goes back to normal. I took a hpt a few times earlier this week, BFN. Has this happened to anyone else? This isn't a normal AF for me. Should I test again? Or? Just trying to get some advice.