I tend to worry a lot. Is this a sign that I have paranoia?

Paranoia is more than too much concern or worry; it tends to involve a more intense sense of doubt and mistrust. This is different from worry - which is more a feeling of anxiety, hesitation, nervousness and uneasiness without automatically thinking and/or believing that other people are trying to harm you. Most people who worry can tell fact from fiction and have a good sense of situation. On the other hand, paranoid psychosis is a phony, rigid belief that doesn't dislodge even when one is confronted with evidence that disproves the belief.