I'm in the process of switching doctors at 28 weeks pregnant. I was told last week when I called…

I'm in the process of switching doctors at 28 weeks pregnant. I was told last week when I called that they would no doubt be able to accept me but now that my transfer papers are there, they are saying I might not be able to see the doctor I want. I'm hoping either my first choice or my second choice will take me. Good vibes would be appreciated. This is so ridiculously stressful.