I also have a hesitation when it comes to left/right. As a kid I could only ever remember it as "left is the arm I wear my watch" so even as an adult I always had to take a second to think "watch arm or not" even a decade into the cell phone era when I stopped wearing a watch.

Now I live in Japan and when I speak Japanese I don't have the same problem at all. The brain (or at least my brain,) is a weird.