Tell me about the balloon please??


I was just told by surprise I'm being induced tonight and they are having me sleep with the balloon catheter inside me tonight and tomorrow morning starting medication. Reason is elevated blood pressure - 38 weeks 5 days. I haven't done any research on this and I want to know everything I need to know before 8pm tonight.. does it hurt, does it usually do its job over night? But my cervix is closed and high as of right now. So doctor said it could take a couple days or it doesn't have to, everyone's different. What is your experience? Please and thank you, I'm a nervous wreck!