It sounds like you and I are in the exact same boat. I came out to my mother a few weeks ago. She basically said she didn't agree with it, but she loved me anyway (the same thing she said when I told her I liked women). She left anything regarding financial support up to my dad (they're separated). But she did a little more than pull the religious card, and consulted with members of her bible study group. I don't know what they said, but she said they're supporting her, and they agree with her. Though I can't say I'm comfortable with her telling people without asking me if it was okay first.
I'm already in the process of legally changing my name. Already have the forms paid for and completed, just need a copy of my SSC (which I seem to have lost while abroad...). She said she would always think of me as her "little girl" and nothing would change that, and that she doesn't think she'll get used to calling me Orion, but she's at least tried calling me "Ri" (my given name was Moriah) as a compromise.
I try and politely correct her when she uses the wrong gender pronouns or nicknames, but she just gets frustrated with me...
Hope it gets better for both of us.