stream of conciousness

I sometimes experience a kind of random "stream of conciousness" type thinking where my brain tends to just make random connections either with words or sometimes a sound or song will pop into my head. I suppose I could just call this unorganized thinking or some type of ADD-like symptom as well. Does anyone experience this? When it happens it tends to heighten my DP. Makes me feel as if there is no organized self thinking these thoughts because the thoughts themselves are disorganized.