New fear of crowds, help!?

Found a Couple Names. Desensitization or exposure therapy focuses on changing your response to the object or situation that you fear, and may be helpful for specific phobias. Gradual, repeated exposure to the cause of your phobia may help you learn to conquer the anxiety. For example, if you're afraid of crowds, you would start by imagining crowds, then being in a store, then going to a busy mall, then joining a crowd.
CBT. Seek a cognitive-behavioral therapist who specializes in phobias. One method they use is systematic desensitization which slowly and incrementally brings the person closer and closer to the thing they are afraid of in slow, graduated steps that help make the anxiety more tolerable.