Advice

Can anyone give me a little advice please....I'm due on in 1 day but thought AF was making an appearance yesterday as I had some very light spotting so light it was only just pinkish! Got up this morning expecting AF to have fully arrived and nothing not even spotting...I have no sign of AF no cramps or usual signs I get right before except aching boobs. Has anyone experienced this before that they can give me a little advice, I'd really appreciate it! Thank you :)