I am 12 DPO and have a 32 day cycle. AF is supposed to get here on Sunday. Today after BD when I used the restroom, I noticed a little brown tint as I was cleaning up. It was post intercourse so it was mixed with other fluids but I'm wondering if it could be implantation bleeding? I've had light cramping intermittently throughout the day. After I wiped, it was gone! Any ideas as to whether it could be implantation?