When I started smoking a long time ago, i had that effect where I felt like my voice wasn't mine. I was just listening to it in another way and it felt just like when I listen to my voice in a recording, it sounds weird and it makes me think "do I really sound like that? This is really how people hear me?". It's like my mouth was speaking without my mind speaking at the same time, feeling a bit like my body was speaking on its own without me ordering it, kind of. It's a kind of egg and chicken problem because when I started to feel like that I felt immediately awkward, like people look at and listen to something that they think is me but that info t feel is me, it disrupts the relationship ad feels very awkward, which made me even more self aware and observing my voice even more, and I think its a very natural reaction. Not sure if it is related in any way to what you experience but it reminded me of that. I occasionally still have that sometimes dor just a few seconds and the it's gone.