Here's our story to conceiving. I was put on metformin as soon as the RE saw my ovaries, they had a ton of cysts. He also started me on a baby aspirin daily. I did three rounds of clomid with increasing dosages with no response (apparently my ovaries hate clomid!). I did a total of six rounds of letrozole 7.5mg for eight days. I produced good follicles on the high dose, but they took a lot longer to mature than most people. With all of these I used ovidrel as well. I had two chemical pregnancies using the metformin, letrozole, and ovidrel with intercourse. After the chemicals we moved on to the same regimen except with IUI and a second ovidrel injection five days after the first to help with low progesterone. We conceived on the second IUI. I hated everything about the IUI, but I really believe that's what did the trick. That was going to be our last cycle before taking a long break because we were not ready to pursue IVF.
I never thought it would happen. I had given up hope. Don't lose hope and stay informed with what your doctors plan is. My RE had a rule that we could only use a treatment regimen for three cycles and then try something different. I'm glad he kept us moving and changed with how my body responded to previous treatment. I was very resistant to trying IUI, but now I'm very glad we did.
Also make sure you are being monitored throughout your cycle. I had lots of ultrasounds to make sure the follicles were growing. Sometimes I would have to go in every other day because they wanted the follicles at just the right size before triggering. My body took so long to grow follicles that if I would have triggered on day 14 when some women ovulate, it would have been way too early and a waste of a cycle. I didn't usually trigger until day 23.
Good luck with your journey and don't lose hope! I know how it feels to be waiting and wondering what the future holds. The thing that helped me the most was to get my mind off of TTC. We started remodeling our house so I barely had time to think about my treatment at all (except when the hot flashes hit me!).
I hope you get your miracle soon!