Ah man, I'm sorry to hear that. Hypnagogia can cause some anxiety for me sometimes but when I realize what's going on and try to stay calm, I can usually redirect the fear back to peace and euphoria. I wish I had that power in my waking life. I do sometimes see apparitions and it is definitely scary. My thing is that it often starts by feeling like I'm floating upward into the sky and into space (or sinking into my bed and falling into space) and I start to kind of freak out that I'm going to fly into the sun or some scary object and it's usually seeing the object getting closer that starts to make me panic. The sensation of total weightlessness (zero G-force) is usually present. It's so crazy you can feel that in your dreams or hallucinations. Also, flying into black nothingness can be equally unsettling sometimes. Then I'll remember it's not real and force myself to enjoy the sensation of flying, and then flying into a star or something will usually transport me to another deeper and more detailed hallucination. Kind of like it's a doorway to the next level. So freaking weird. I notice hypnagogia usually sets me up for a lucid dream, which is pretty cool too. Falling asleep while meditating usually causes both too, which is the only reason I meditate.. to hallucinate haha.