Any opinions???

Had sex the first day of my fertile window (November 12) currently 7 dpo, a few days ago (November 19-21) I had light brown and pink discharge for a few days and Had cramping that was a sudden onset on November 24. Af due in 6 days, I’ve never had cramping with af ever, and these came out of no where when they happened. I also never had any spotting with ovulating or pre pms symptoms considering the only thing I get with my periods are the bleeding. But what could this be ?