What the previous respondent said is true. Being trans is not a sin. As for screwing the church? I'm a trans woman and an Episcopalian, and recently I was sitting together with a wonderful Presbyterian pastor and I was telling her how I had come across a posting on a different board where the person asked, Can I pray as a transgender person? She and I cried together just thinking about that, and she was angry and sad that the church had created the need for that person to have to ask that question.
But, right now I just want you to travel back in time to when we used to use the 1928 Book of Common Prayer. Every Sunday, right before Communion, we heard the following: Come unto me, all ye that travail and are heavily laden, and I will refresh you.
My dear dear sister: That is what Jesus is saying to you at Communion. And it gets even better. When you receive Communion, listen with your heart and you will hear God say to you, You are my very very beloved daughter, in whom I am most well pleased.
With all the love in my heart, and a whole bunch more,
Freya