so my doctor said she's pretty sure baby is breech so I have an ultrasound Tuesday to make sure…

so my doctor said she's pretty sure baby is breech so I have an ultrasound Tuesday to make sure before they schedule c section .. my question is, how will things work if they schedule c section ? like do I just show up at the hospital and they take me back or what ? sorry if it's a stupid question but I went 41 weeks with my son and had him vaginally ..