Anxiety can certainly bring you down this much and even more. What are you doing for it? Both emotional and nutritional aspects must be addressed.
Start with this. Read it and then go to the hypoglycemic diet at the bottom of the page. You will notice that you will feel better. In some cases this does the trick, depending on the root of the anxiety.
All in all, when you feel these symptoms, don't worry about them. Worry and attention makes them worse. Just notice them and try to let them go. Chances are they will disappear, although depending on your anxiety issues new ones may come along. But don't be frightened. It is merely part of the anxiety. By not reacting and paying attention to these symptoms, they will minimize or even go away.