Have you considered getting a second professional opinion about this diagnosis? Might be worth doing...
I have major depression with psychotic features and have experienced dissociating. It can be really hard.
My friend was diagnosed with DID and the therapeutic approach of concentrating on her other parts, especially when she wasn't feeling them, actually was rather too much, she found.
I hope there are others here who can answer your question better than I can.
And I hope you feel better.