My guess is you're breathing with your chest and not your diaphragm. When you take a deep breath, do you notice your chest expand or your belly? If it's the fo

My guess is you're breathing with your chest and not your diaphragm. When you take a deep breath, do you notice your chest expand or your belly? If it's the former, try keeping your chest still and letting your diaphragm/stomach expand instead. Otherwise, you might just be thinking about it too much. Try to focus solely on the talking and ignore the breathing.