Prozac is indeed a very activating antidepressant and a certain number of anxious people will respond with overwhelming anxiety. You should feel better in several days. Consider asking for an antidepressant like Celexa (now generic), Lexapro or Paxil (don't get the Paxil CR as it is in too short of a supply now, and never stop Paxil suddenly). Stay away from Zoloft, and Wellbutrin as occasionally these can be excessively activating as well with people who have a bad response to Prozac. Remeron is another choice though at low doses is associated with sedation and sometimes weight gain.