Lilly,
I don't know if your attacks are situational (like my aunt has them only when driving on hills) but mine are totally random. I haven't had any at home alone but I have them for no reason when I'm out. The last big one I had was while having lunch out with my best friend. I told her it was happening and I wanted to get the heck outta there but we decided to just sit through it. I told her if I pass out it's her problem. When we talked about it, it got worse. As soon as she started talking about other things, I was able to slowly put my mind elsewhere and I got through it. Every time you get through one with no bad affects, you get a little stronger. Remember, passing out is the OPPOSITE reaction from panic. Panic is your body gearing up for fight or flight, passing out is your body shutting down. You really CAN'T pass out during an attack. Just tell yourself you are fine, there is nothing to worry about and try to stick it out through it. I often keep a bottle of water with me so I can distract my body from the attack by drinking water so my body can deal with that function.
I start back to school tonight and am wondering how I will do. I am going to keep myself away from the thoughts of panic and just remind myself the class is only 2 hours long and then I can go home again.
Hang in there and keep me posted.