Terrifying dream what does it mean?

I dreamt I was sat on my bed talking to my friend and she turned into this man and pinned me down on the bed and kissed me. I was struggling and screaming and he was pulling my arms and legs.

I then woke up still screaming and I couldn't move my legs were still being pulled and pinned down I struggled to the other side of my bed and then "woke up" again, could move and was fine but felt terrified and didn't want to go back to sleep.

Im not sure when I woke up the first or second time but it's seemed very real when I couldn't move my legs. Also I'm not scared easily I don't ever remember being that scared but nothing in particular scared me, just had a feeling of terror.

What does it mean?