AF late

Rocio

I'm pretty regular (28-29 day cycle). I'm on CD 31 and no AF. I usually start spotting brown discharge 3-5 days before my period starts. I took a test on CD 28 and it was negative. Yesterday I started to spot light pink in the beginning, now light brown; but only when I wipe. I have used liners these past 2 days and nothing on the liners. I'm just scared to be disappointed by another negative result. Has anybody experienced spotting before a BFP?