Mine is cyclic too (normally 2 days off / 1 day on); however, last Christmas day was a 4th day off (and I've had several 3 day runs). Nonetheless, during times of high anxiety it will turn on for days in a row.
This cycle is, unfortunately, a roller coaster ride (emotionally). Since your emotional state is intrinsically linked with your T, this is actually debilitating the habituation process. Don't get me wrong, I love my days off and I'm sure those that don't get days off feel cheated. However, in the long run you have to habituate (take your medicine) and the cycle tends to frustrate that process (I would find myself anticipating -- on pins and needles thinking about the next day on).
I do know for sure that high anxiety can kill my days off and that I can moderately improve my days off with a lack of anxiety; but it seems to bias more toward turning on (rats!). In other words, the amount I can positively affect it is less then the opposite. Nonetheless, my T has dramatically improved over the last (it's now a hiss vs. a dental tool and it's not as loud).
In the long run, I've learned to just drop it (that was hard to do, easier said than done). I find I'm better off simply not thinking about it or even really caring about it (in that I don't have a reaction to it anymore). In fact, during the times it turned on for days (my worst fear) I actually counted it as 'good practice' in that I got stronger in my ability to not react to it. Not reacting is critical.
I agree T STINKS! But it is livable...
Mark