I wanted to know is having a habit of biting your lip a symptom of ocd?

Its more on the: level of biting your nails--a nervous habit aimed at discharging anxiety. Called "oral cannabilism," lip biting is not serious unless taken to extremes, in which case medical intervention is indicated. I would first look at the causes of your tension, rather than trying to find a psychiatric diagnosis. Try stress-relieving techniques: meditation, exercise, etc. and lower stimulant ingestion.