Faint lines - chemical pregnancy?

Knottie59658549

I’ve had very faint lines on multiple test brands for the past 3 days, but they’re not really getting darker. I also had a BFN on a first response at 12dpo after the faint BFP, followed by faint lines on internet cheapies. Don’t think I can upload photos here.

Is this a chemical pregnancy? Has anyone had super faint lines like this and gone on to have a healthy pregnancy?

I’m getting an HCG blood draw later today.