caitlin, i to have suffered with the same problem so has many people on this site. i usually yawn a bunch to catch my breath. it is a natural fear of not being able to breath. i'm sure you think about it all day and that is where your attacks are coming from. you may not be thinking of a specific thought at the time of your attack. what happens is that you may have many thoughts throughout the day--- can't breath, what if i die, what if i have another panic attack, someone or something makes you mad... each time you experience a scary thought or get mad your brain releases adreniline
thinking there might be something wrong-- will after a while that adreniline is released causing what we know as a panic attack-- tight chest, difficulty breathing, lightheaded etc.
practice breathing techniques and relaxation.