So frustrated

So my last depo shot was July of last yr my periods have become normal since about February 21-23 day cycles. But the last 3 months I've been trying to track my ovulation and haven't had any luck.. I test from the time my AF is over till the fertile window is gone and I haven't gotten a single positive opk :( so not thrilled. This is really disappointing for hopes of a baby in my future :( so much for wishful thinking. Today was supposed to be my peak day and yet this was the test from today :(