That sounds absolutely terrifying. I’m really sorry you went through that. Some dreams don’t stay in the dream. They spill over into the body. When a nightmare hits that deep, your nervous system can react as if it really happened. Nausea, heaviness, feeling unreal, exhaustion. That’s a stress response. Especially if you woke up mid-fear. It doesn’t mean you were actually poisoned. It means your body stayed in survival mode. Be gentle with yourself. Eat something small. Drink water. Ground yourself in simple things. If this keeps happening, or the dissociated feeling lingers, it’s really worth talking to a doctor or therapist. You’re not weak. That was intense.