Don't panic yet dahl. I had exactly the same thing last week around the time AF would've been due. No cramps and not much blood just when I wiped. Apparently it can be something called breakthrough bleeding which means your hormone levels might've been slightly low around the time AF was due and a little has come through.

I panic'd big time too and was sure I was mc'ing again, but so far it's stopped and no more bleeding, cramps etc.

If you are concerned make an appointment and discuss with your doctor and get bloods done to check your hcg levels asap.

Good Luck dahl, my fingers are crossed for you