Hard to tell, Highlander, whether you really don't want the baby or if all the more negative aspects are just at the front of your mind right now. If you really dont want to be a mother, you don't have to be - have an abortion or give the baby up for adoption.
I too have been obsessing about all the negative aspects of pg. I have decided to take basic professional advice and then decide what level of risk I am comfortable with (food, sports, etc).
Don't engage in conversation with people about your pg or pg in general unless you want to. (I tell people that I don't want to think about labour yet at all. Every single person so far has immediately changed the subject.) Change your GP if you feel like crap after you see her. Hire a consultant and skip the midwives, if their politics get you down. (As you say that you have elected for a CS so perhaps you have done that already?) If you are living overseas you will probably be able to afford to hire a nanny to help you so you don't feel oppressed and isolated by motherhood.
Pardon me, but it sounds as if a lot of this is about guilt feelings. There is no sense in fighting for your right to do it your own way, then feeling guity and miserable about it! The motherhood guilt thing will eat us up if we let it.
I can perfectly understand your resistance to stopping sports and diet changes. People go way over the top and get simplistic about everything. But I don't really get your resistance to folic acid. So what? Either take a vitamin supplement or monitor your diet to ensure adequate nutrient intake.
ps - what kind of job was withdrawn? Unless it's extremely physical, it sounds like a violation of human rights to me.
Good luck