I have intrusive thoughts which may be similar to your "nuggets." I don't say them outloud, though. But, they are attached to emotions and are bad and scary thoughts that I don't like. They are angry and mean and violent, usually, and I'm not a violent person by nature. I don't like to say what they are specificially. The thoughts come on in little bursts of anger and frustration throughout the day. Sometimes worse and more often, and other times barely at all to none. It just depends on how well I'm doing overall, I guess.