It happend to me when I had my son but I think that's cause I have chronic irritable bowel syndrome so the meds made loosened everything up . Weird part besides being embarrassed was the doctors acted like it was so normal they was so unbothered by it . One kept wiping me and the other was telling me to keep pushing and to ignore that I was pooping myself . Turns out after 3 hrs of pushing that I can't deliver naturally and I had to have an emergency c -section . Which this time around il be having another as well .
You may be scared now for it to happen... But trust me, your going to be pushing so hard, and hot; and feel like your never going to get the baby out, you seriously won't care haha I pushed for roughly a hour straight, and almost didn't get my 8.7 pound baby girl out. I was pushing so hard, and seriously didn't care about anything but getting her big self out! Haha
they change the padding under you each time when you do it and like @shersaid use the B.R b4 and make sure youre completely empty because no matter what even if its a little and you think you can control it you cant. it will come out while pushing lol