This happened to my sister when I was an adolescent, and she was a teenager, way back in the mid 80's or early 90's. She used to bruise very easily too, and would find the bruise marks on her legs or arms where she felt a force gripping hard and pulling her. Happened at least once or twice.
She never screamed, and I do not remember her saying she tried to scream.
She definitely felt the malevolence, like an invisible being you can sense but can't see.
I am no expert, but I think your mind was either fooled by a dream reality, or the sudden awakening to terror and pain gave you a relapse to a moment when you were younger. Calling out for someone who isn't there is a lot like reliving a memory when they would have been there. Sometimes our dream mind tries to live out a familiar memory differently in a totally new sequence of events. And in a nightmare, we can get caught in a forever loop that always ends in the same feared outcome that is inescapable.
Sleep paralysis happened a lot when I was a child, and did not realise it was abnormal. I still get it sometimes. Happens more likely when the room remains quiet, but the sunlight is slowly becoming less dim through the window in the morning. Circulation often feels like it is cut off to my entire face and limbs, along with my nerves unable to spark any movement to lift the weight of my limbs or head. Breathing through my nose is calm and shallow. Often I feel the only way to awaken from the mental daze is to attempt to breath deeper, or hold my breath, and rock my chest left and and right if able. I either pass out into sleep again, or outdoor sounds awaken me and begin to help me regain conscious control over my physical reality.
Something you can try: choose an anchor object to look for in your room when the next occurrence happens.
Examples: A digital clock by your bed or on the wall, to mark the time. A soft slipper or pillow on the floor you can feel if you fall off the bed again. A scented candle next to your pillow. A glass of water you can test if it vibrates, or drink to test if it feels wet or cold on your skin. Even a note taped by your bed to read can remind you what you want to remember when you awaken feeling confused from a dream. "I live on 149th street in Greenville with Sarah and John, and I do construction working for Mr. Gordon."
RE: What is this Sensation?