Awe, (((((((((( possum )))))))))) I think you expressed yourself wonderfully and I'm so sorry that what you live with every single day is so difficult. You have every right to feel as you do.
I know that I can only validate and empathize with you. Being a singleton, the only way I can possibly relate to what you are saying is when I have a big decision to make and I have the right brain/left brain battles going on with all the possibilities/probabilities to the decision that I come up with. I know that is nowhere near what you and other DID'ers have to deal with regularly.
I do know that when I'm writing things out and/or talking about them it does seem to help. In the mean time, hold on tight possum....you can move forward!