OMG Russ, you just reminded me that I have had that symptom, too. I have felt like an idiot, and forgot all about that. It is terribly dangerous, and I have flown right through a couple of lights that way, and then realized what I've done. I have also confused left and right MANY, MANY times, and have been SO embarrassed. I literally have to stop and think for a second, "Ok, I write with this hand, so this is right". People have looked at me so crazy, like a GROWN WOMAN has to hesitate when asked to extend her right arm, or hesitate to turn left when someone says to go left, but I have never ever thought of that being a symptom. I have confused the turn signal with the windshield wiper switch on my car, because they look just alike and are on opposite sides of the steering wheel. I also have forgotten when I shift, whether I should go up or down to park or drive. It is all nuts, but you really brought this to light for me right now. It almost makes me feel better, putting that with the mercury.
This started a long time ago, so long I never would've connected these. I just thought something was wrong with me.

I remember the same year that I had all of these amalgams put in, I was driving my old car down the street one night, and went to turn on the turn signal, and got confused and instead moved the SHIFTER which was on the column on the opposite side. I ended up swiftly landing it in reverse, while my car was going forward at about 35 MPH, and it jolted my car, I almost wrecked it, and it died right there and I thought I was stranded. I realized what I had done and was terrified, and didn't know why on earth I would do something so stupid. Thankfully my car started and still worked, but I don't think it was ever the same after that, and I have never lived it down. That happened about 14 years ago.
I also find myself wondering sometimes, especially when there are no other cars on the road, if I am actually going down the correct lane, or should I be on the opposite side?

I also have quite a few OCD symptoms, too. <img src="/ubbthreads/images/graemlins/frown.gif" alt="" />