When should I test?

Mayra • Mommy of boys!!
We have been trying for a baby since my birth control came off. Not so much luck turns out that we made love on my most fertile days which was 01/08/17 and 01/09/16 without knowing since I had gotten a new phone didn't have the app yet. So I tested today came out negative, is it to early when should I test AF is supposed to be here Friday but my periods vary ever since the birth control.