I've got a doozy for all of you to weigh in on, please!

My usual luteal phase is 13d, shortest ever was 11, longest 14.
I had earlier than usual cramping this month and yesterday I had some pink spotting on what was day 9 post-ovulation. At first I thought, "oh great, just when I'm getting geared up to TTC I develop short luteal phase?" But it was just once. No bleeding at all today. A little mild cramping. This is NOT a pattern I've ever had before. So now I'm thinking, implantation?

But get this - husband and I were expecting to start really TTC next month, have been very intentional about postponing pregnancy for over a year and were a little sloppy this month. Really, just a LITTLE. Aroused genital contact and brief anal penetration but no vaginal penetration and no nearby ejaculation (intentionally finished him off in the shower, directed away from me). That was two days pre-ovulation. We knew it was mildly risky and are open to pregnancy, definitely. But seriously...

What would you think? I know only time will tell, and I'm sort of assuming AF will start any minute now. But could it be? Was that crap they told us in health class true? Haha!