I don't mean to belittle your experience-- obviously, it was upsetting for you.
That said, by complaining-- what do you hope will come from this?
The reason I ask is that I find making a suggestion is far more effective than just complaining. Most medical entities/clinics or hospitals do offer the ability to file a grievance, so you could do that.
But what would you want to change? That's the crux of it-- if you are going to make contact, I'd be very concrete in your suggestions: "I would ask that your doctors would be made aware of how insensitive their questions were. Looking on the form, the doctor could have ascertained if I was married without making me feel bad or looked down upon. Many women come to your doctors seeking advice about how to proceed during pregnancy; we need to be treated with respect and with understanding."
I'm also going to stretch a little and say that, from what I remember of your other posts, these experiences may have triggered other negative feelings for you from your past. I'm not saying they weren't insensitive, just that as you get older and more confident in yourself, you will be more able to just let go of this stuff and consider it as just one person's opinion. One person. Yes, she may be judging you-- and honestly, I've heard of similar treatment from other moms (one of them Catholic and it was her third child, not an extraordinary amount of children by any means). They just shook their heads at these buffoons and vented and then let it go.
Think about what you have going on in your life right now. How much time and attention do you want to give to this? So, either a strong letter with good suggestions or a grievance--- either way, try to let this go after that. You've got too many other things to focus on-- don't let this keep you from enjoying what you have now. Only you can give someone the energy to take the joy out of something-- think about it-- how many minutes did you actually have to spend in the presences of these unpleasant people? Probably not nearly as much time as you had to cuddle up with your belly and love on that baby growing inside you. :)
For what it's worth, the pregnancy I had before I had my son-- the doctors attempted to micromanage it; I refused. You do have a voice even in the moment. It wasn't easy to assert myself, but I also declined testing which wouldn't have helped me. (they wanted to do several ultrasounds on a high-risk pregnancy which I did end up losing, no one's fault) I do understand not testing; we declined an amnio as well; I just knew our son was either meant to be with us or he wouldn't be with us. These are very personal decisions-- we have to do what we feel is right for us.