Why do I feel nothing? I’m scared.

Like Brook said, that numbness is your mind protecting you from painful feelings. Have compassion for yourself and know your body is doing its best to care for itself, even though it doesn't always manifest in the best ways. It's scary but it won't be like that forever. When you feel numb, try to tap into your physical sensations. What do you feel? How is your body reacting? Scan your body, use your senses, and hopefully it'll bring you back to the present moment a little more. Maybe try journaling out the things you're thinking about to process them. Time will heal. So will therapy and medicine.