Am I still in the running?

On the 28th of this month I had very very light spotting when I would wipe. It only lasted around six hours, and I never spot unless my period quickly follows the next day. AF isn't due until 1/3 or 1/4, and ive taken two pregnancy tests, which have both been bfn. The only symptoms I guess you could say I have is the possible implantation bleeding on the 28th, occasionally feeling nauseous, and peeing a little more frequently than before. My stomach has been lightly cramping and bloated, so it honestly feels like AF will come when she's expected, but has anyone REALLY felt like AF was coming, but instead got a bfp?