I have trouble crossing roads...?

Whenever I cross any road that I have previously crossed, I have to cross with my left foot first hitting the actual road as my breath hits the bottom of an exhalation, and at the other side of the road, my right foot must lead onto the pavement as a breath hits the top of an inhalation. If I do it incorrectly, I must cross the road back, and go again. I know this isn't normal, but I deal with it as best I can. My mind would be put at ease somewhat about this if I could categorise my problem. I first suspected it to be OCD, but it doesn't fit the symptoms properly. If anyone knows what the name for this is, if it has one, I'd be greatly appreciative.