Is it implantation bleeding??

Morgan

I am on CD 27 / 12dpo and am not due for my period for another two days. I had some light cramping yesterday for about an hour. BFN on Clearblue Digital today and on a $1 store test this morning. Now I am a light brown bleed. Definitely more than spotting, but still light. My BBT went up today. I am so confused?! I am never early on my period.