Is there a chance

I’m now 13dpo according to the app and around two to three days after the ovulation window I started cramping and had the pink streak of blood when I wiped x then yesterday which is 12dpo I had cramping and was convinced AF was coming as I’m due tomorrow however wiped again and the same pink streak appeared when I wiped x nothing else since x could I be pregnant ? As I didn’t want to test too early x