Welcome to HealingWell,
Many things cause chest heaviness. Yes this could be caused by anxiety, however, I am not a physician. I would certainly encourage you to see your psychiatrist again.
You may want to use this resource for information only.
Anxiety Symptoms, Anxiety Attack Symptoms (Panic Attack Symptoms), Symptoms of Anxiety:
http://www.anxietycentre.com/anxiety-symptoms.shtml
Kindly,
Kitt