I was doing the dishes just now and suddenly I realized I was talking to myself. It was in third person and pretty much all advice (and come to think of it, fairly good advice) but it was things that I hadn't admitted to myself yet and I couldn't stop. This happened last night, too, but more of a general angry muttering and I didn't really want to stop at first. But when I realized I couldn't get myself to stop talking, I went and found some long poetry to read out loud instead and that seemed to work as a way of getting the voice to focus on something else. It hasn't happened before last night, and frankly it's kind of freaking me out so uh. If anyone has any clue what this is? Also, I managed to stop talking this time when I sat down to type this. I don't know if that's because I switched things that I was doing, or what.
I have to say, I admire your poetry reading strategy. :) Lots of people talk out loud to themselves, but you might want to talk to a therapist about the not being able to stop yourself part. Just the mere fact that it's freaking you out makes it important enough to look into.