What does giving birth without meds feel like?

I had a c-section for my first and my midwife and obstetrician gave me the go ahead to deliver vaginally this time. With my first it was such a gong show (pictocin and epidural then c-section) and I only got to 2 cm. I want to try giving birth naturally and med-free, but I am a bit nervous and unsure of what to expect...

So my question is....what does it feel like? Also any tips that helped you with the pain would be much appreciated!