Two Vaginals then C-section?

Has anyone had two perfectly normal vaginal deliveries with no complications and then needed an emergency C-section with their third, or something similar?

I’m freaking out because I’ve already had my vag ruined twice, I’d hate to have a C-section this time around.

Thanks.

To add: I’m not high risk. This pregnancy is going as smoothly as my first two. Baby isn’t breech that I know of. Doctor doesn’t check with an ultrasound, though. I’m just terrified of having one after having two vaginals.

I understand that it doesn’t matter what baby you’re on…I was looking for stories of one or more uncomplicated vaginal deliveries and then needing a C-section the third+ time around.