I doubt it's OCD, I agree with Bud it sounds like a classic anxiety symptom. After the initial high anxiety falls away (with me it took around 2-3 months after my injury) I reckon we're left with a residual anxiety that takes longer to leave. I think controlling our habits is a way of calming ourselves and conserving brain energy.

For a long while I used to find myself sighing and exhaling for no real reason, when I became conscious I was doing it I made an effort to stop. I think it's easy to get into a loop if you're not careful, what made me think about it was reading about mindfulness and how the mind can alter the functioning of the brain. However, I think with most people as daily life takes over again the compulsive habits are dropped.