5 days late...

I’m currently 5 days late, my period is always on time. This is the 1 time I’ve been late so many days. I tested a few days ago with blue dye 2x and got the faintest line. I’ve tested with first response but they’ve been negative. Could I still be pregnant? I don’t remember when I ovulated since I don’t keep track. Could it be possible I ovulated late and still be pregnant or can late ovulation delay period? See below for pictures on pregnancy