Your mother sounds like mine then. I actually had to teach myself not to go to her whenever I was facing some sort of difficulty. She's over religious and would only tell me to ask god for forgiveness and such. But I understand your situation. Unfortunately, you can't make her pay attention to you and if you try to have a conversation with her and she doesn't care to listen there isn't anything you can really do. I know it hurts and because it's your mother it only makes the pain worse, but there's really nothing to expect from someone who refuses to understand you or doesn't even try to.

Going off isn't going to help. You'll only hurt yourself further in the end and possibly damage what relationship you do have with your mother. But from the sound of it, you do get some kind of interaction with her. Am I right?