I cant give you any ideas of whats going on with in you and your partner. I can tell you what things in your post translates to being with in me....

info on my present state...all my alters are now integrated as one whole person again but back when my alters were not integrated sometimes I would have this weird situation where I would suddenly hear voices thanks to a friend or family member making suggestions to me. my treatment provider told me this type of hearing voices was normal. She told me to try something... listen to music for a stretch of time, the same song over and over again and then listen to what my mind does. I was amazed after listening to this one song for about 15 minutes my head had this running song in my head, this voice repeating words from the song but in conversational order. whoa freaky. then I expanded on this and did a meditation with a friend and it happened again where I heard voices based on my friends suggestions... I went back to my therapist and said what the heck? she laughed and said I had a case of self hypnosis and suggestibility. the voices happened because I was in a relaxed state of mind and open to the suggestion of having alters, hearing voices by other avenues outside myself. she further explained to me I could weed out these kinds of voices from those that were related to my dissociative disorders by remembering that DID is a mental disorder that begins in childhood. therefore any of the voices that I hear that have not been there since childhood are not my voices related to my having alters. worked for me.

An other type of hearing voices that suddenly happened/ happens with in me is called psychosis / Auditory hallucinations. these kinds of voices just suddenly start happening and have not been there all my life. some are normal Auditory hallucinations and others are psychotic symptoms with my many mental and physical health problems like bipolar, depression, anxiety, ptsd, and MS.

I too talk to myself at times in many different tones and accents. this is normal for me and not a dissociative problem. its actually something I learned to do when playing as a child. you know how kinds play pretend and play house and other roll playing activities where they make their voice sound different as they play they are moms and dads and babies and other characters. in elementary school we also had recess and many school activities that taught to talk to your self and peers in different voices/ tones called acting, role playing, school plays, chorus, band and other classes too utilized this normal activity my brain does, the same in high school. I remember this one time I was out with a friend and we just with out talking to each other started adding a southern sounding tone to our voices, some lady in the shop we were in congratulated us on our perfecting our "lines" she didnt know we were not in the community play. even now as an adult I naturally change the tone of my voice based on my moods and whims and activities. my children love it when we are out and about and I switch into a british mary poppins sounding voice, then in turn naturally change their voice to match. My wife will out of the blue start talking like a french/ Canadian / Montreal mix and not realize she is doing it and my children and I will take that and run with it during the conversation... as you can see this talking to one self and others in different tones and accents is normal for me...

the astral projection well here where I live I once told my treatment provider what if I astral project right out of my body.. she told me not to worry about that Astral projection is considered to be religious/ paranormal activity in NY so if I astral projected I would need a scientist and a priest not a therapist to help me with that and she is prepared to refer me to someone in the event that that happened. there was a class at the college where students were studying paranormal activity and she knew a local church that deals with people who's souls get dispossessed (willfully removed, astral projected) from their bodies.

that said there is a dissociative problem that I did have where I would mentally dissociate (feel numb, spaced out and disconnected) then feel like the furnishings I was on or near. this is different than astral projecting (purposely physically removing ones soul from the body to another location.)

I agree with the others in not trying to self diagnose yourself and your partner. my suggestion is if this continues to bother you contact your or a treatment provider who can help diagnose and get you treated for this what ever it turns out to be with in you