Hi H.P.
These symptoms are often caused by improper breathing (hyperventilation from anxiety) and/or chronic tension, both of which we can experience when anxious.
Here are several sites that teach relaxation exercises that should bring down overall stress levels, and therefore symptoms.
Self Help sites with breathing/relaxation exercises instructions
Panic attack relief exercises:
http://www.healthcentral.com/anxiety/c/73076/34334/breathing-lessons/
http://www.healthyplace.com/
http://www.stress-relief-exercises.com/
http://www.ehow.com/video_4405003_breathing-exercises-panic-attacks.html
http://www.psybersquare.com/anxiety/panic_relax_I
Try them a couple of times a day for a week and see how you feel. Consistency is going to bring best results.:)
S.C.