Still breached???

I am going on to 36 wks tomorrow and have my appt on Friday to see if he has flipped. My midwife said if he isn't flipped by this week then we have to start scheduling a c section😢 and I'm really terrified of the thought of a c section and I can't explain the reason why. My older sister said her baby flipped at 38 wks so to not worry but I can't help but be concerned. I've read about some exercises like crawling which I've been doing but when I feel him move it still feels like his head is still up by my ribs. Has this happened or is happening to anyone else?