How can calm my nerves?

Yes: First, be sure you are minimally physically active every day. Then, look up "mindfulness-based stress reduction". Try to do at least five minutes twice a day. Then, if you still have symptoms, find a "cognitive behavioral therapist" to help you learn coping skills. Each of these actions have been proven to help anxiety. At last resort, there are meds which work best with therapy and exercise.

Stay active: Exercise is a great way to relieve stress. Your body releases endorphins during exercise, which can help you feel calm. If you exercise 30 - 60 minutes a day, your stress levels can improve. When stressed, take 5 slow, deep breaths with your eyes closed, then roll your shoulders forward 5 times, then back 5 times. This will slow your heart rate and release tension in your neck and shoulders.