Hi Britney,
I'm new here, but I've been around the TG community here in Seattle for about 2 years and have known about my partner for all of our 21 years together. I'm a mom too. Although I am very supportive of my MTF wife, Chelsea, I was not always so. I remember when she used to talk about her feelings of wanting to be a woman, it would make me feel very uncomfortable. I would always listen politely for just a bit and then change the subject. It was a feeling in me that must have been fear, but it made me feel literally kind of sick. You should realize that your parents probably feel something like that themselves when you talk about your transition. It does NOT mean that they don't love you; it means they don't know how to love you very well right now; they are in shock and paralyzed by their fear.
Have you tried giving them the book True Selves: Understanding Transsexualism for Family, Friends, Coworkers and Helping Professionals? When we came out to our parents, we gave them this book and eventually they actually read it and it helped. Of course, Chelsea's mom read it before her dad, but even her dad read it after a few months. Don't expect them to read it right away, but gently encourage them in order to increase their understanding and lessen their fear.
I understand what you mean when you say it hurts you physically inside and emotionally to hear them use your male name and pronouns. Chelsea experience this as well. I was pretty good about learning to use the correct pronouns, but I was willing and it still took time. She understood, but when I talked about her in the past, I used the male name and pronouns. She explained how much hearing them hurt her, so I even adjusted that. They will be able to make the adjustment eventually. They need to go through a grieving process. Even though they are gaining a daughter, they are losing a son, and they loved that son; some say they just loved the idea of their son, but really it is that and much more. They loved your face, your smell, your voice. All that is changing. Don't be afraid to let them grieve. They might not understand that they are grieving but that is what we experience. It passes. But not without going through the stages of grief including such nasty emotions as denial, anger, and sadness. It seems like they are living in denial right now. Don't get angry at them for their process. That's a lot to ask of yourself. But I know you are a strong and big hearted young woman. I can see it in your eyes. You have courage. You can do this.
I have one more bit of advice, if I may. Your parents are supporting your room and board needs right now, is that true? You don't pay rent or contribute to food? You will find that if you can express your gratitude to them for doing that for you, really and truly, they do not have to and if they did not love you, they wouldn't - then the expression of that gratitude will bring more goodness into your life. The more we focus on the things in our life that we are truly grateful for, the more we attract things into our lives to BE grateful for.
Oh, and work on your legal name change (if you haven't already). If your name is legally Britney, they will take you more seriously. This helped with Chelsea's parents, anyway.
Okay, that's a pretty long post. I hope you don't mind. You have a lot of friends here who love you. I hope you meet some others in the non-virtual world soon. You do truly deserve a wonderful life.
Love,
Ruby