Chemical pregnancy but only spotting??

Had a confirmed chemical and have been spotting for the past week but it’s light brown and barely any. I thought I would just get my period. I have bad cramps but almost no blood. had a bfp 12 days ago AF was supposed to come 10 days ago but instead just have this weird spotting. Seems that most people who have a chemical get their period pretty soon after the chemical. Did anyone else have this what I’m having??

Thanks!