Fantail I'd suggest one thing don't run any scenarios past your mother, don't invite her into the discussion about your future. By all means thank her for what she has done for you, show her that you are living a sober life successfully but don't invite input or response on where you live.
It sounds to me like you need to go back to California to make that return as a sober you, whether you stay or not is your choice.
I'd get a ticket and make my way back if I were you but never forget wherever you go, there you are.