I understand where you are coming from. I get those thoughts of death that run through my head to the point where I can't sleep at night. I'm relatively symptom free myself, but too much stress and I have mini freak-outs that last an hour or less. I don't know if there is a word for what you are experiencing, but I like to call mine bleed throughs. There are still times where the bipolar symptoms bleed through the meds. Anyway, I find that during the day it isn't bad as long as I keep myself busy to try and block out the repetitive thoughts or occupy my mind with something, even if it is just making up a little story or daydreaming about something I enjoy. For me distraction is the key.