Did anyone have implantation bleeding then spotting the day AF was due and go on to get your bfp?

I had what I thought was IB 6dpo and now I'm spotting today with no cramps  (AF is supposed to be here) which is weird because I always wake up with it and have really terrible cramps, and spot the day BEFORE she's due to arrive ? I did have yellow CM with red dots of blood yesterday and the day before too? have no idea what's going on!