After my first was born, I never thought I would ever want to go through pregnancy, and birth again. His birth was horrendous, and very traumatic. My husband said afterwords he thought he was in a slasher movie directed by Quentin Tarrantino.
My second son was born when my first son was 3 years and 3 months old. The second birth was so quick and easy, I did not even have painrelief! Howver, I had pretty bad spd, and pnd, and was quite happy to conclude that our family was complete. No more pregnancies, no more births.
However, now, when ds1 is 7 and ds2 is 4, I find myself wondering about nr 3.
You are still young, the traumatic birth is still very fresh on your mind. Rather than having major surgery, which may NOT be the solution you are hoping for, you need to work through your emotion. Have you seen a therapist? If not, see if you can get some councelling, but whatever you do, TALK about your birth experience as much and often as you like. Share it, write it down. Post about it here. And rather than surgery, go get yourself a coil, or find another method of birth control which is not so permanent.