According to my tracker I don't start for another 8 days but I noticed yesterday brown spotting in my undies. The brown spotting got worse throughout the night and when I used the bathroom today it was bloody, like I started my period. This has never happened to me so I'm not sure what's going on. Yes, I've had unprotected sex and I did miss two days of my birth control. Can anyone ease my worry? What's going on?