Solitary, I really think you would benefit from avoiding aspartame, aka nutrasweet. That stuff is poison, and has been shown repeatedly to have significant psychological effects on a small part of the population. Maybe try to avoid all diet drinks for a few days, like the red bull you mentioned drinking earlier today, and just see if it makes a difference in how stable you feel. You may not be one of the people effected by it that way, but I suspect you are.