OCD is characterized by performing rituals/impulses to exterminate anxiety, fear and apprehension from obsessions (in this case your thoughts of unfair persecution).. so, what exactly are you doing to exterminate these fears besides becoming distant and suspicious of others?

POCD (purely obsessional OCD) might fit your description if you honestly think it has something to do with OCD.

I don't think it's narcissism for *****. It's a paranoia trait.

Anyway, this could be anything from paranoia (deep-rooted or drug-induced, your call), anxiety or classic low self-esteem because people have ****ed you over numerous times and you were helpless.. or you have a 6th sense and you actually are being plotted on.

You say you go through periods where it is basically a remission where you don't have those symptoms, could that have something to do with being in contact with not so many people lately hence the lower chance of thinking you're being unfairly persecuted? Are they are at ease when you don't consume drugs or caffeine (if you are a user of them)?

I don't think you are elaborating enough to get the answer you are looking for,
I very much doubt it's OCD or narc.

Edit:
POCD is associated strongly with mental rumination,
example off Wikipedia:
"For example, an intrusive thought "I could just kill Bill with this steak knife" is followed by a catastrophic misinterpretation of the thought, i.e. "How could I have such a thought? Deep down, I must be a psychopath." - does this seem to relate to your and your belief of being a narc?
Take a read of POCD: http://en.wikipedia.org/wiki/Purely_Obsessional_OCD