I can relate a lot to what you wrote...I have never been diagnosed with AN, only EDNOS, but my therapist refers to it as anorexia sometimes -- because they are very much anorexic behaviors...even though I don't fit the criteria for weight.

But it does feel bipolar - my highs (mania) is when I am restricting and starving myself. The lows are when I am eating (somewhat normally) and feel horrible and horrible about myself.

The voice has been increasing in intensitty for me too...i'm sorry you're struggling.