Is this a miscarriage?

I am 9 days from af and woke up this morning with cramping and bleeding. I took a pregnancy test and there is a very very faint positive line, it's hard to tell if it's even there. I'm only about 8 or 9 dpo. My periods are fairly regular and I never start this early. Something about this bleeding doesn't feel like a normal period. Is this a miscarriage?