12dpo question

Cindy • My DH and I have 1 child together and have 4 all together. I have 3 from a previous marriage. We are currently trying for our last baby. We've been married since 05/14/16 and together since 02/10
My husband and I have been trying for almost 20 months with no positive. I'm currently taking progesterone to help my levels. Af is due tomorrow, per glow, I'm 12 dpo and checked my cervix this am and I had a tiny spot of pink discharge on my finger.....I mean really little. Would this be too late for ib or could it be?