What are my chances?

Debra

This month was the first month my husband and I were super serious about TTC. We followed the app's fertile week days and BDed 4 times, however I never really noticed any CM changes and still don't at 4 DPO. My cycle is pretty regular so now I'm not sure if we focused on the wrong week. Anyone else not notice big changes in CM then? I mean just from what you see in your underwear.