When I am about to fall asleep I get a pulsation in my head it sounds like a swishing noise and if I relax into it I start to feel paralyzed and I panic to move and wake myself up. It s very scary has been happening for months. It just happened right now
You need to see a neurologist because what you are describing it seems to be a pulsatile tinnitus and sometimes its caused by cranial vascular problems.