i suffer from the same thing and have been for about 2 years..u may need to get some medication and relize that u have to stop worrying..worrying is causing your problems (obviously right lol) the best thing for you to do is to excercise,practice observing what you are saying to yourself mentally,change your negative self talk to positive self talk, and when you are experiencing a panic attack jus let your body do your thing,you cannot die from it no matter how uncomfortable it feels, u will not have a heart attack or stop breathing theres are psychological reasons your body is reacting the way it does physically but no one has ever died from a panic attack, eliminate caffeine from your diet, and remeber when u feel worried and your body starts having its reactions remain completly passive, and remeber that the symptoms you are feeling i.e. racing heart, is caused by your fight or flight response and is purely adrenaline and it will peak then disaapear..i hope this helps you