Please... anyone?

I just wanted to reach out and ask for prayers, good vibes, baby dust, or whatever other positive things you guys believe in or rely on. I'm really struggling to maintain positivity that our miracle will happen. My story- my hubby and I have been married for almost 8 years. Ttc since the day we got married. I have a 12 years old from a previous marriage. My ex is a lying, cheating, abusive, waste of space and when I found out I was pregnant with my daughter I also found out he had given me another gift...... And now due to scarring I have blocked tubes. I had surgery to unblock them and they said the outcome looked good and we should be pregnant within 6 months, that was 3 years ago. I feel like such a failure because I can't give my husband a child. He is amazing with my daughter, our daughter. While she still has contact with her bio, she considers my husband to be her "real dad". Sorry to be so long, I'm just in a really low, depressed place right now and I'm just reaching out for any glimmer of hope. Thanks for taking the time to read this!