Hello everyone, we have a problem! (Well, it's more of an issue for me…

Hello everyone, we have a problem! (Well, it's more of an issue for me). My little one is biting hard and hurts so much, even sparks are coming out of my eyes. It hurts, oh man, she doesn't understand anything yet. A bluish mark has appeared on her chest already. How do I fight this? I'm afraid to feed her ?