half awake half asleep?

Not that often I go into a weird sort of state in my sleep? it happens about once a year. I wake up from a dream but im only half awake, my eyes are open and my senses work but i dont feel quite right. My vision is all weird and my depth perception is all messed up, things keep moving closer but getting further away at the same time. Its quite an emotional/scary thing! does anyone know what this is? I’ve also had problems with sleepwalking before

It sounds a lot like sleep paralysis or something similar. It could be the onset of SP. Do you find it difficult to move and do you experience auditory or visual hallucinations?