Our #5 made me content to stop and happily sent DH for the snip
Life goes through periods of chaos and slightly less chaos, most of the time though I feel very stretched thin.
If we didn't have chronic health problems and ASD in the mix it may be different.
I was actually having a cry to DH yesterday about this. I had appts with two specialists this week about two children, and feeling like I just can't do it- basically the amount of work and attention as if I had two 2 yos instead of them being 13 and almost 9. In addition to a tween 11 yo who is starting to act way too emotionally needy, a 4yo who likes to act like a baby and still tantrums when he doesn't like something, and a 6yo who I feel misses out on any attention.
As I said to DH, when we planned a big family we couldn't have predicted these extra needs and I never realised how draining it would be.
I don't regret any of them, but... Yeah. Chaos and fatigue.