I have a few questions:

Can implantation blood have clots or is that a sign it’s not implantation bleeding?

I am taking the mini pill and I was 9 hours late a week and a half ago. My period is in 4 more days and I’ve lightly been bleeding for almost a week. It’s been light pink but today I noticed it’s red and has blood cots. Is this just break through bleeding right before my period starts or does it sound like implantation bleeding?