That sounds like a foley ball. My beautician had one. She said its wasn't bad and they come in every hour to tug at it to see if you dilated. Once it falls out I believe you're supposed to be at 8 cm.

I had a folley. I don't know if that's the same thing but it was definitely uncomfortable getting it put in.

cervix ripening pill! they gave that to me the night I was getting induced. not gonna lie it freaking sucked and it hurt getting put in. mine even slid out so they had to do it all over again. but 4 hours later my water broke and got my epidural 45 minutes later. that thing worked like crazy.