Anxiety attacks. Take a walk, exercise, call someone and talk. Perfectly normal in early recovery. If you see a doctor, make sure you stay away from any benzodiazepine drugs (Ativan, Xanax), which are frequently prescribed for anxiety and are some of the most addictive and cross-addictive drugs there are.
Non-addictive anxiety meds are available. See a doctor who understands addiction, though. Chances are your personal physician doesn't.