Hi Kerry, let us know how it goes with the rest of your family.
Something you said triggered a memory with me that I'd like to share, if you don't mind - you said "they all think my being pregnant gives them the right to run my life".

I remember feeling very similarly about my in-laws at one stage, when I felt they were treating me like I was a child. It was only after many years that I realised what they were doing was trying to include me in the family by 'taking care' of me as if I WAS one of their children, and it was done out of love, not out of a desire to belittle me. Unfortunately, this realisation came too late for me to make peace with my MIL, who died some years ago.

Please be a little careful of their feelings when you make your stand - I do agree VERY STRONGLY that you and you alone have the right to decide who you do and do not want in the labour room, but be aware that their hearts are probably in the right place towards you, even if expressed badly.