Confused

Theresa

I had a positive pregnancy test for the past 3 days now. On the day of expected period I stArted to spot and then the next day all spot brownish discharge. Third day dark red blood flowing. Mild cramping here and there but not like my normal menstrual which is usually 7 days and really heavy. I’m confused I’m scared if I am pregnant it’s just another miscarriage. I can’t help but to keep testing. I don’t have an appointment until the 13th. Any idea what’s going on or any advice? I’m bleeding now and I think I’m bout to go take another test this late. Ugh so nerve wrecking. I heard first response been giving a lot of bad indents too and I’ve been testing with first response. If they are evap lines I wish they first response would fix that!