Quoting Meg ♥:" It could really be either. Since you got a BFN today, I'd test again Friday or Saturday as that would be 15-ish days since you had sex. Good luck. "
Quoting Meg ♥:" It's a bit tricky if you haven't had a normal cycle yet. Typically EWCM is before you O. It's the ... [snip!] ... Normally it's around 9dpo though and it's common to spot anywhere in there as implantation bleeding, but not all women have it."