J., I don't know how long your cycles are, or how old you are, how many years you want between children, or so many other things. So, I'm not going to tell you to relax or just let it happen. Sometimes that isn't the answer. I relaxed for 5 years before conceiving my son. It didn't make a difference for the first 4 years.
However, the values, if high for the luteal phase, are still good, then. However, if you feel like things are not working well for you, then I'd talk to your OB, to see if there is something that needs further investigation. I also tried Clomid for a couple of times. It dried up my cervical fluid and no baby either. Now, I'm trying Femara for the first time. It doesn't have the side effects Clomid did. And I'm hoping it will help us reach our goal of another child. I hope you find the answers you are looking for soon. Waiting is NOT easy when you want to conceive, I know. And that does not mean you aren't enjoying your other child. Best of wishes to you.
J.