Help. Worried about my faint line

Tibby

So I had implantation spotting on saturday. which for me is about 15 dpo. ovulation was on the 2nd. I took a pregnancy test Sunday and today and they're both really faint. I'm 4 days late tho. So I expected a bfp. I'm worried it's chemical but maybe that's just me googling to much. can anyone give me insight? am I testing to early even tho I'm late? so confused. been cramping since the day my period was due. is it possible I implanted to late?