Spotting before AF?

Megan
Anyone have spotting 2 -3 days before AF is due and end up being pregnant?? I never spot before my period except the day it starts so just trying to figure out what is going on. ..I hate waiting. AF due tomorrow but been spotting very light since Wednesday. Wednesday was just one time light pink and since then it has been brown...tmi but nothing in my underwear. Just when I wipe..