TTC for 4-5 months now

Hi I never post here but I was hoping for some positive reinforcement. I have one daughter, and she's perfect but my fiancé and I are ready for another. When we made my daughter we weren't even trying. But after I had my daughter I was told I have an ovarian cyst that ruptured and it can make it harder to conceive. Now me and my fiancé have been trying. And I get so excited to take tests but it's negative after negative. I put my legs up, I do ovulation tests, I'm healthy, and it hurts girls. To the point where I cry because I feel as if it's my fault I can't try or there's something wrong with me. Idk how you girls do it I swear I'm falling apart here cuz my man is so excited and I don't want to let him down.