Creepy! I know things are going well for you, but I usually hear any voice during a manic episode... Is there anything you may be ousing aside? Fears, according to my doctor, can also trigger something like this... i know also wih a new baby fears arise... Maybe its your subconsious side coming out... But if you see a therapist, I would definitely bring out up to them. Voices are never necessarily good, but lets hope its you just being afraid, and that its some freak chance that this happened. Im sorry I cant be of much help... I wish you all the best!