10 dpo spotting.. late implantation or early af!?

[stinasTroop]

Hi ladies! Im new here this is my first month ttc again. So I've had some really good symptoms so far or some terrible pms. Either way im so confused. I have never had am early AF and know for sure when I ovulated, the 24th of Dec. We bd 3 days leading up to o, and that day so I have a good chance I believe. I poas this am and it was bfn. This afternoon I had a bit of spotting and that was it. I've been slightly crampy since 7dpo and it continues today but nothing compared to my AF cramps. I read that hug doesn't start to flow until you implant, so if I barely implanted im not out right?! Or os this early AF! ? Ahhh any insight would be great. TIA!! Baby dust to all xxx