yes it is possible. I think people have different names for it. I've experienced something that does sound similar to what you're going through - I had very seperate parts that would be active at different times but I would always be there - just not in control I guess. I used to doubt it alot... but I don't doubt anymore. My voice does sound really different, my bf can always tell.

So in my humble opinion perfectly possible! And, I agree with your T that it's a good idea to figure out what your parts want/need ... that way your overall self will be much better off =)

*sends safe hugs*