Yep, that's right!
My worse experience with Fibro Fog was a few years ago. I was working part time in a restaurant, and the manager asked me if I would go with her to get some restaurant supplies, and she wanted to take my car. My head and shoulders were splitting, and I was very fuzzy headed, but I said "Sure-we can take my car-but only if you drive-I feel like crap!" She said she'd drive. I asked her if she could drive a standard car-a 5 speed, and she said "yes" thats what her car was too.
So we got in the car and she asked me where the clutch was in my car. I was really hurting bad, and I just mumbled "oh, it's around there somewhere-just keep looking".
We sat there for 10 minutes (no joke!) before I realized that I drove an automatic!
That scared the living crap out of me! I was diagnosed with Fibro shortly after that.