Implantation or AF?

I’m not gonna be posting photos but my tests all keep being negative. I am either 11 or 12 dpo. Glow says 11 but Premom says 12. Anyways, I spotted light pink today when I wiped and it was a drop in the toilet. But it’s gone now. Yesterday either 10 or 11 dpo , I had creamy white discharge and it was very watery too but creamy white. Is this implantation? I’m supposed to get my period in 2 days. Or could this be af? I have pcos so my periods are irregular but if it’s af this is the shortest cycle ever. My period is usually 33-35 days long and if it’s af then this period will only be about 29/30. Just wondering anyone get a bfp aftwr 12 dpo???