e3chick - The midwife's view should be respected by the consultant obstetricians. Don't be disheartened. I think you need to find an advocate. I had the same experience (including the tears) with our local hospital. They are a small unit who don't have much confidence and are interventionist and traditional in their outlook which, IME, means they don't really have a problem actually making the decisions for you with no input from you at all. I believe they have no problem telling you actual lies to get you to do what they say.
We changed to Liverpool Women's who have a specialist twin clinic, a consultant midwife for normalcy, much more experience with twins and a much more progressive attitude. Is it possible, if you are not getting anywhere with the hospital you are booked with to change to somewhere more progressive?
Have you thought about hiring a Doula?
This is the thing we did that has had the most impact. I would never have thought about transferring care if she hadn't suggested it and would never have known to contact the consultant midwife for normalcy without her suggesting that.
Marslady is a Doula in London website here. It is my opinion that what you really need is an advocate. You can contact mars through her website or hop onto the d'y ever thread.
I understand how hard it is. You don't want to go against what the hospital says because it'll make them uncomfortable and you think they must be suggesting these things for a reason. It is especially hard if the hospital are the place you need to provide you with information as well as care. My local hospital refused to give me their guidelines for twins, I was going to get my sis to steal them from the hospital intranet because she's a doctor there but we changed hospitals instead and I can see this is probably a reason to believe we were never going to get anywhere with them anyway.
Speak to mars, she will undoubtedly help you feel much better. Hire her if you can. My doula has been the best thing we've ever had, it'll be largely down to her if we get everything how we want it and this is despite me being a supposedly more knowlegable and empowered patient with having such a medical family.