Don't listen to the first commment, I wasn't dialated at all & got the epidural. The epidural worked good up until I had to push. There's a button u press to give u more epidural. The nurses wouldn't let me press it anymore so I think that's why I felt everything.
Honestly, it all happens so sudden that i didnt get an epidural until i was 7 cm. I was in labor for 24 hrs. Just hold off for as long as you can, it lasts trust me. You cant feel anything for a few hours after also.
Most hospitals want you to be 4 cm dilated before you get one. They are on a drop system so you should be fine, I was a pleasure to push a button that added more to my iv. I also had to get stuck the next day though because the needle moved and stopped working.