could it just be af?

I’m really confused, my periods normally start at 10dpo I have very irregular cycles. My app says I’m 3 days late I know I ovulated because my boobs were sore (they only get sore after I ovulate) now it’s less sore but the day my af was suppose to start I wiped once and had one drop of pink spotting mixed w vl red streaks, I figured it was period on the way but never started, the second day I had a little reddish/brownish spotting after using the bathroom I figured then it was af since it was a little more noticeable but it never got heavy or started 3rd day I had no noticeable spotting when I wipe it looks tannish/pinkish barely any in toilet paper I have to literally stare at the toilet paper to find any tint.. also I have no af cramps at all... my boobs are less sore than they were. Could it just be AF? or maybe implantation? I took a test the day af was suppose to start and the day after both negative. This is today... and that’s me trying to get in there and see if there’s more spotting