TTC after depo and on letrozole

Hi mums/mums to be,

Hoping for some positive stories/similar experiences.

We have a nearly three year old. I was on the pill previously stopped taking it and got pregnant with her that week. (Super lucky I know!)
However after she was born I went on the depo. We have been TTC for the past year now with no luck, I haven’t had a period since before she was born.
I saw a specialist a month ago and got prescribed letrozole had my day 21 blood test last week and still not ovulating 😭😭

Any experiences on the depo and/or letrozole?

I’m trying not to be upset or ungrateful as I know we are so lucky to have one and other people can’t have any or are in way worse situations but still breaks my heart 😭 only want one more if we are lucky enough and didn’t want a huge age gap!