Do you have recurrent and persistent thoughts, impulses, or images that at some point feel intrusive and inappropriate and cause anxiety and distress.

Are the thoughts, impulses, or images are not simply excessive worries about real-life problems.

If you have thoughts or impulses like these, do you attempt to ignore or suppress them or to neutralize them?  Common ways of trying to cope include thinking of something else, focusing on a distracting activity, etc.

At some point, have you felt that the obsessional thoughts, impulses, or images are a product of your own mind (as opposed to believe that someone is putting thoughts in your head, or some other belief)?

Do you find that you feel driven to perform repetitive behaviors  or mental acts in response to an obsession?  Are there things that you feel you have to do according to rules that must be applied rigidly?  Common examples of these behaviors include hand washing, ordering things, checking.  Common mental acts are things like compulsive counting, or repeating words silently.

Are the behaviors or mental acts are aimed at preventing or reducing anxiety or preventing some dreaded event or situation?  Are they excessive for this purpose (for example, checking to make sure the stove is off over and over and over to make sure the house won't burn down) or are they not connected in a realistic way with the feared event they are supposed to prevent (for example, fearing stepping on a crack since something terrible might happen)?

At some point during has it occurred to you  that the obsessions and compulsions are excessive or unreasonable?

Are the obsessions or compulsions distressing for you?  Are they time consuming (for instance, do they ttake more than 1 hour/day)?  Alternately, do they significantly interfere with the your normal routine, your work or school, your relationships, or your social activities?