We used natural family planning to “space” our children. Now I think, if we hadn’t known, through that method, when I was fertile, we probably wouldn’t have conceived naturally. We would have faced the age-related declining ovaries and the missed timing. I had them at age 36 and 38. I was told at 44 that it was way too late and I should give up on any more.
I recommend learning exactly what your body is doing.
Good luck! I’m sure some little soul somewhere is going to be your baby.