For any of you that dealt with infertility with your 2nd child (or ones after #2) - how did that affect your ideal vs actual age gap?

I feel like this is one thing that I am currently really struggling with. We had wanted to have #2 when DS was 2 1/2 - maybe a little over 3. Well, he turned 3 in early Sept and we just got our latest negative soooooo, that timeline is a bit out the window.

Maybe it is silly to worry about, but I've been thinking a lot about it lately (will they be able to be close? is it going to be harder for DS to adjust since he'll have been our only for so long, etc)