Faint line 7 weeks after miscarriage

I had a miscarriage started bleeding 29th June

Baby come out 3rd July (8w)

It’s been 6 weeks 6 days since I started bleeding.

I had a period 28 days after.

I’m now due on in 10 days and seing the FAINTEST shadow like line.

Is it possible this is from the miscarriage still? Even tho I have had a period in between?

Or could it be the very start of a new pregnancy? I’m so confused it’s killing me😭