Unmedicated Birth

Nina
I haven't told my gynochologist yet, but I was hoping for an unmedicated birth. I do not have a midwife, I have a gynochologist and I'm giving birth at a hospital. However I want as little medications as need. I for sure do not want an epidural (as of right now), but I'm open to it if I feel the pain is absolutely unbearable. 
 
Any of you second time mommas done this? When should I bring this up to my doctor?