My doctor suspects chronic hyperventilation due to my anxiety history and my symptoms. how can this be cured? it's making me feel off all the time

Deep breathing: Hyperventilation, or very shallow chest breathing, is a common effect in anxiety. Pay attention to how you breathe. Try to breathe so deeply that your diaphragm expands and your breath appears to make your belly rise. Notice the feel of the air as it passes your nostrils and fills your lungs. Notice the slight pause at the end of your inhale. Allow the air to move freely from your lungs.

Combo therapy & meds: Most likey a combination of psychotherapy and some medications would be used to treat the condition that you describe. Obviously you would want to have complete evaluation including a physical check up and a psychiatric evaluation. Treatment works and there is a good chance that treatment will help you.

Therapy?: Have you yet tried any form of psychotherapy? Typically, the optimal combination of things to treat emotional issues such as anxiety or depression is medication (which, on your best day, is supposed to take the edge off symptoms) but the real gruntwork takes place in psychotherapist's consulting room.

If this is anxiety,: find a mental health provider and treat it. Hyperventilation is one of 33 possible symptoms of anxiety, of which there are about seven categories...Here's a beginning reference: http://www.psychologyproductsandservices.com/page2.html