I am the same way! I used to think the racing thoughts was just part of my mania but with meds and all i have found I just think a LOT. i will dwell on things and play them over and over in my head and wonder if my words or actions were inappropriate and then after spending way to long on things my mind just goes and flashes from thing to thing with no rhyme or reason. maybe you are like me and just have a fast train of thought and all.
Hope my reply helps some. GirlN