I do anything I can to harm myself?

Lately I've been in a bad way. I've been starving myself, cutting myself, burning myself, even overdosing... just to hurt myself. I feel like I need to punish myself, like I'm a bad person who is just a burden to everyone. Like I am better off dead. I don't know who to turn to anymore. I've tried therapy, counselling... everything. Nothing helps. I'm starting to think I should just end it all. Who do I turn to now... what do I do? I just can't think straight.