Implantation bleeding?

Yesterday morning I woke up with scant spotting. (First 2 pics) today I woke up and it was very faint again but as the day has progressed, it has gotten slightly heavier. (3rd pic) My period isn’t due for another 9 days and I am 4 days post ovulation / fertile window. I had unprotected sex about 2 weeks ago but I also took plan B afterwards. I have bled before from plan B but I’m not sure if this is what’s causing my spotting. There have been clots in the blood. Can anyone help?