Sorry, I meant when I am going to sleep. Not yet alseep.
Not clear how you know what you are doing when asleep, I read you post to say you sleep alone, in a separate room form other family members... did one of them report hearing?
The fact you don't remember a dream/nightmare doesn't mean you are not having one... in any case there seems to be something in you subconscious mind that you are very opposed to and it comes out when you go to sleep. Try to think about something you are concerned about happening that you would say "no... no" to and try to resolve that issue.
Professional counseling may also help, you could start with and ask your primary care doctor on this idea. If you are truly tired after 8 hours sleep you are not getting restful sleep - apnea?