Implantation or Early Period?

Jenna
I ovulated on the 5th. We did the BD between the 4th & 6th. AF isn't due to arrive until the 19th. I lightly spotted on the 9th, nothing on the 10th, then again on the 11th thru today, the 13th. It's mainly just light red. I did break out with acne right when I first spotted as well, which usually happens right before AF arrives... I'm not having cramping, but more of a sensation, if that makes sense. Normally, AF arrives as expected, never early. I don't know if it's an earlier/lighter cycle due to stress, or IB! Usually, by now, if it was AF, she would be heavier. What do YALL think?