Could I be pregnant or could this be mc

So I took this 4 days ago. There is a faint line. I have never ever got 2 lines. So I was excited. But the next day I started bleeding lighter than my normal period but not like spotting. Blood seemed different to darker, brown or red. I am still currently bleeding. Haven't made a doctors appointment yet. I was gonna wait til bleeding stops and take another hpt. Or can I take one anyways? Will it still show up if I still am? Could I still be "pregnant" or could this be MC.? Has anyone had this happen? What was your end result?