OMG I totally identify with that whole idea of not being cut out for motherhood. I had that same thought. Like oh, my body couldn't birth (c-section), and how, I'm having so much pain nursing. This is nature saying "you are not a mother." It's amazing how that kind of stuff can really mess with your head.
I agree, looking back I should've mentally prepped myself for the possibility of a c-section. But I just didn't. I honestly (arrogantly!) thought that it wouldn't happen to me because I was doing everything *right.* I went to a chiropractor through my pregnancy, I did yoga, I ate everything my midwife said to eat, I took walks, I went swimming, I got massages, I watched the Business of Being born about 80 times, I read Ina May's Guide to Childbirth, I hired a doula, I planned a homebirth with the most respected midwife with the lowest hospital transfer rate in town.
The bottom line is that birth isn't something anyone can control. I think a lot of the natural childbirth literature is marvelous. It's empowering and informative and wonderful. But I have to say, I think it sometimes (inadvertently) gives off the wrong message. And that's that if you make all the right moves, a c-section will not happen to you. I agree that often early inductions and the dance of unnecessary pitocin in hospitals can result in avoidable c-sections. But this does not mean that all c-sections are avoidable. I remember hearing a yoga instructor say "Okay now I'm going to show you some labouring positions you can do so that you won't have a c-section." Looking back, I feel rather angry at her for saying that. It leaves those of us who had c-sections thinking that somehow, if we had just done X or Y or maybe not done Z, then this wouldn't have happened. And that's a rabbit hole that no mom needs to go down, as it leads nowhere positive.
Boy, I just realized I really got on a soapbox there. Sorry for the rant! Whew, but that did feel good to get out.