I understand this all too well. It will seem as if everything in the day is going great, my mood is nice, my thoughts are okay. A thought will come into my head (sometimes a flashback, an insecurity etc.) and I 'shift', my thoughts become angry, clouded, I fall into the spiral of self-criticism, hatred, despair, anger you name it. The WHOLE DAY will be thrown out the window. (Like your example, the whole experience is gone) It's amazing how fast it can happen.

Like you explain Carmasia, the 180...my thoughts will be going down one path it seems fine and safe (I can liken it to driving down a road) a negative thought happens (a cat jumps out from the bushes and scares me) rather than continuing on happily driving like a "healthy" person would, I have to drive into the ditch, pound my fists on the dashboard, blame myself, scream obscenities and start crying . haha, okay maybe not the best metaphor but it describes my experience with that. haha always fun (not).

I'm glad you're in a stable relationship, that's always a plus. Good thoughts your way today!