What causes waking up in the middle of the night, hyperventilating? no nightmares or noticeable triggers

Night wakening: There are many reasons people may wake up and even if you don't remember dream content dreams could still wake you up. Have you had a good physical exam to rule out organic issues? If you talk with a Psychologist expert in sleep disorders you would have a thorough history taking to see if there might be a movement disorder, sleep apnea, or other condition. It also doesn't have to be trauma to aff