I didn't have implantation bleed, but if you don't usually get spotting before a period it sounds likely (or possibly later ovulation than you thought). When is your period due?

I have heard though that implantation bleed is often bright pink blood, as it is fresh.
AF could be due anytime now. This is my first month off the pill again. From what previous experience I have, my cycle is somewhere between 4-5 weeks. I'm currently at CD32. I think I'm currently around 14DPO.... So this started about 12DPO....