Has this happened to anyone else?

We always use condoms when we have sex, my period was due to start on Friday. (I'm always super regular) I went pee on Saturday and there was a tiny bit of blood when I wiped. That was it. Now it's Sunday night and nothing! I also had a dream Thursday night that I had a baby and I was breastfeeding, I could feel milk letting down in the dream. I haven't been having cramps like I normally do before my period. Nose has also been super sensitive to smells.

Saturday morning I took a negative test, but I figure if I was having implantation bleeding then I wouldn't get a positive test for a few days.

Has anyone elses period done this? Or did you test positive late?