How do I deal with family who are against my bi-polar problems?

My family are what I'd consider, 'hard-core Christians' and they like to think there is nothing wrong with me at all. I try to get them to hear me out and listen, but they do nothing but say it isn't their problem and that I'm just making things up. All they do is tell me to believe that there's nothing wrong with me and I have no mental issues. They criticize me and try to tell me it's all nothing but the 'truth.' Then they go about saying the reason I'm thinking that I'm bi-polar is because I'm filling my head with bad things from the things I watch and listen to. They put it out saying I'm 'letting evil fill my brain with lies' 'it's the devil that's making me feel that way.'

I'm so sick of them thinking their way of life is the answer and that I can't simple be a bit different because I'm bi-polar. Now I just feel like I'm completely bullied by them every-time I come to them about my BP problems.