Gosh, it's hard to say hun as I have never experienced anything like that.
I think technically once you've got your peak on the CBFM, you can expect to ovulate 12 - 36 hours after that so it could have been a bit of ovulation spotting.
On the other hand, it could be implantation spotting which you would normally expect about a week after ovulation.
I hope it is the latter for you hun.
x