Hello Matt,
That's must have been a really terrifying experience. There must be a reason for what you are calling a panic attack. Keep in mind that when we cannot get air, we panic. It is normal for everyone...for example when a person gets the wind knocked out of them, they panic.
Have you had your thyroid checked? And your hormones? There could be a physiological, (as opposed to psychological) reason behind such an attack. If I were you I would have a complete blood workup.
Not to frighten you, but an acquaintance (age 52) was having what she thought was a heart attack and went immediately to A&E. She was extremely agitated, breathing heavily and in a state of panic. The doctors examined her, did blood tests and concluded that it was a panic attack and gave her a tranquilizer and sent her home....where she died of a heart attack!...
My personal experience with what could have been considered a panic attack was during my first pregnancy. I discovered that after drinking something hot or cold, my heart would start racing and I had trouble breathing, felt very weak and my extremeties would tingle from not getting enough oxygen. I would have to kneel down and lean over a low table until it passed, concentrating on breathing in and out as slowly and deeply as possible. My doctor said not to worry (!!!) and that it was the vagus nerve being stimulated by the hot or cold drinks...and to make sure my drinks were at room temperature. That worked.
I really don't think that a panic attack comes out of nowhere. There is some medical reason. Hormones, vagus nerve like I had or an overactive thyroid, arrhythmia which I did develop later on btw...something. Maybe the side effect of some medication you are taking.
Delve into it more deeply and keep track of when this happens. Never leave any condition up to doctors to figure out. YOU are the guardian of your own body and YOU have to do the investigating. A doctor doesn't have time for that and he/she is not with you all day. You alone can be a real detective observing your own symptoms and when and how they occur and what they could be related to. We are lucky to have the internet nowadays which can help in medical investigations. Bouncing ideas off your wife can also help as she could have some input. A lot of these medical issues can be resolved with common sense. I am sure you can get to the bottom of this disturbing issue and then with your doctor's input, do tests and develop a treatment plan.
Please let me know if and when you DO discover what is causing these problems.
In the meantime, stay away from any stimulants such as coffee, even tea, chocolate, colas which all contain caffeine.Even cigarettes which are also a stimulant. Avoid alcohol; maybe one glass of wine?...or not. You have to gauge... Perhaps keep away from anything hot or cold... Eat well (6 - 10 fruit/veggies per day). get plenty of exercise (at least a good long walk every day, rain or shine), engage in activities you enjoy and try to relax and not worry. Keeping busy, maybe volunteering can keep your mind busy. You will know what helps. Listen to your body's advice. Good luck, Matt.