How will I know when I’m done having babies?

I have two daughters one is 19 months old and one of 4 months old, my partner and I had our girls close together as I have endometriosis and a few other problems; I had gynaecology surgery and it took 7 months before I fell pregnant with our first and

we were told it would take a long time to fall pregnant again due to my problems and having a csection - it took us less than a month and I couldn’t be more grateful. - I thought I’d explain why we had them close 🙈

But my questions is, how do you know when your done having babies? 👶🏻👶🏻

I’ve spoken to my partner and he’s happy with two - don’t get me wrong I love our girls more than I could possibly describe. But I can’t shake that feeling of wanting another in a few years... I can only have 1 more according to my obstetrician due to having already 2 csections and only being aloud 3.

Basically, how will I know when I’m done having babies?