im the same. im either hyper aware and terrified of everything or im numb and nothing matters. i dont know for sure but i have a feeling its to do with ptsd/trauma. like we're naturally in a state of anxiety and caution bc we're scared of something traumatic happening, but when we're not anxious maybe its bc we logically know we're safe in the moment so our anxiety goes down but since we dont know anything other than anxiety we just feel numb, or maybe its bc we're so exhausted from being anxious that we just cant feel anything anymore until we get energy back again. idk tho, just a thought. its tiring existing in two extremes.