Okay, guys. I've been terrified to share this with you because I don't want anyone to tell me I'm experiencing psychosis (terrified of that).
I will first say I have told both my pdoc and my T about these audible thoughts and neither of them are concerned. My pdoc shrugged it off, saying I was "hearing thoughts" and my T said it would only be a concern if it happened at times when things weren't quiet and it interrupted my interactions with others.
When I'm hypomanic, especially while trying to fall asleep, I sometimes hear noises in my thoughts (as if there was a song running through my head, or someone flipping stations on a radio). Sometimes it's certain words (random, usually) and other times it's just noises. Last night it happened again and one of the words was really loud, like someone shouting at me. That scared me, so I got up and took some extra Risperdal and Xanax with a glass of milk. My mind calmed down after that.
I am not "hearing things" because I am not hallucinating that they are in the same room as me. It's just thoughts. Some people have told me this is normal. I think it's a hypomanic thing that I am just going to have to get used to (this is a relatively new symptom for me). It helps if I listen to some relaxing music, then they go away.
Whatever they are, they sometimes concern me and I often worry about it the day after it happens, that I'm going to go psychotic.

The only time I have been almost psychotic was when I was on a high dose of steroids and I was not being treated properly for bipolar by my GP. I was hospitalized then.
Now, I'm very stable and handle work and regular life normally. These "audible thoughts" along with my anxiety and obsessive thoughts are the only really problematic symptoms I get. Like I said, my doctors are not concerned, so I suppose I shouldn't be, either. Just curious if any of you experience this symptom as well or know exactly what it is.
Diagnoses: Bipolar 2, OCD, and GAD
Rx: Lithium, Trileptal, Latuda, Risperdal, Xanax XR and PRN