13 months ttc...

And still nothing. I started a few minutes ago which is 2 days early. I'm getting getting so depressed over it. I have one daughter shes 8 but not from my husband. I just dont understand why we cant get pregnant. We time it as perfectly as we can, I've been using the Ava bracelet for 3 months now. Is anyone in the same time frame with similar issues? I have regular periods. I had mirena for 7 years no periods but started 2 days after removal.