Flashing Smiley Dilema

Okay,

So I had Eggwhite CM on 12/22, took an ovulation test on 12/23 and it was negative, took an ovulation test on 12/24, 12/25, 12/26, 12/27, 12/28 and 12/29 and 12/30 all of which were the flashing smileys and now, I’m spotting brown. Has anyone experienced this? What could this mean?