Do I still have a chance?

Destiny

So Sunday I went to the bathroom later in the afternoon and had very little brown spotting on my underwear. Monday it went to more of a yellowish color and was also very light. Than yesterday I had brown again but only when wiping. Af is due Sunday the 13th. I've been ttc for 2 years now really hope this is a good sign. Anyone else have this and got a bfp??