Am I Miscarrying?

Here’s a basic rundown:

Positive test (faint line, but there) on Monday (6 days ago).

Brown Spotting- Monday-Sunday morning (today)

Pregnancy test- Sunday @1pm NEG

Passing large clots- Sunday night (just now)

I usually have very light periods. Hardly ever any clotting if any. I also should note that my periods usually just start and stop. I don’t typically have any spotting, let alone brown spotting.