I know it sounds strange to practice breathing exercises when breathing is your problem however this simple belly breathing technique may help prevent hyperventilating.
Belly Breathing Exercise
1. Lie on your back and place one hand on your stomach and one on your chest.
2. As you inhale, fill your belly with a slow, even breath, and watch your hand rise on your belly and stay still on your chest.
3. Exhale gently and watch you hand fall as you slowly and evenly breathe out.
4. Repeat for five minutes and practice every single day.
Use this technique when you are under stress for relief. It is also important to practice this breathing technique when you are not under stress. Practice when you are watching TV, sitting at a stoplight, before you fall asleep, or during breaks from work. Practicing when you are not stressed will enhance you well-being and give you mastery over the exercise so that when you need it you will be confident in your skills.