Why do I feel extreme guilt sometimes for nothing?

I don’t know why, but sometimes I feel extremely guilty within myself. I feel dirty, dumb, a nobody, hopeless, and like I’m crazy. I feel like I’m a burden to people, especially when people help me out. Like if I’m with my family or people, I will feel like a burden, and they don’t want me. I’ve never had a birthday party because I feel I’m not worth it. I don’t know where all this guilt comes from within myself. I feel dirty inside and like I need to pray for 5 hours to feel clean again… Anybody else go through this or know what this is ?