Star, I don't know quite what to say, except that at the end of the day, the only person you have to satisfy is yourself.
Not quite the same, but I stuck religiously to the food/care advices when pregnant with DD1. My reasoning? A) I've always felt that no matter how 'small' the risk, it's 100% if it happens to you. B) I know that I am the sort of person who would rigorously examine my conduct and my decisions to see if I could be in any way responsible if something did go wrong.
I admit, I am quite interventionist (for myself). I pulled the plug on DD1's pregnancy when they scanned me at 39+6 and declared her small for dates. They said they didn't want me to go too far over, so would have me in at the weekend. I said 'I'm here...induce me now'.
I pulled the plug on DD2's pregnancy when she stopped growing at 35 weeks. They didn't know why, they didn't seem to be that interested in finding out why, but couldn't reassure me that she would be ok if left. Only that they had 'seen worse'. I told them that if they couldn't tell me why and couldn't tell me she would be ok, then I wanted her out. NOW. The registrar said no, the Consultant said that I was perfectly justified in my reasoning, and induced me the next morning.
I pulled the plug on DD3's pregnancy. Slowing growth, low amniotic fluid, general sense that all was not well. She was induced at 38+6.
DD's 2&3 were either or situations. Either could have been justified. I was confident that I responded well to induction (DD1 was a 4 hour labour from an unfavourable cervix with no syntocin).
The thing that has stayed with me, is that during DD1's diagnostic process, the first thing I was asked about was my pregnancy. I was asked if I had done anything, taken anything, eaten anything which wasn't usually recommended. I could say no.
I'm not saying don't investigate. But, there comes a time when I wonder if you need to battle so much, so much of the time? If it had been me, and it was genuinely impossible, I would instinctively be asking to postpone, not trying to change the system to match my expectations.