Does anyone know about an incubus? I may have had a experience?

You were experiencing sleep hallucination paralysis. I suffer from this and it makes you hallucinate hearing/seeing and feeling things that are not there or real. Next time it happens and you want it to stop, then just focus on your breathing and try to breath real heavy. This sends a signal to your brain that your body is waking up and then you are able to come out of sleep paralysis.