Hi!
Sounds tough and I can certainly realte to feelings of panic in crowded spaces. I think the term 'panic attack' is often confused with an anxiety attack.
From my understanding (and recent experience with the former - not long after realising I was AS), an anxiety attack is the feeling of becomming massively overwhelmed by feelings of anxiety/panic (what it sounds like you are describing but please correct me if im wrong). A panic attack, on the other hand, is something different, a more physical condition. In a panic attack the body suddenly floods itself with adrenaline and, while I think results can vary, often (and in my case), you start to massively and uncontrollably hypoventolate, start shaking all over, the chest tightens and you can feel like you are about to have a heart attack (although you wont really). I required about 20 minutes and the help of my wife before I could breath normally once again.
The interesting thing is that my panic attack came on when, although feeling a little emotional trying to get my head around the likelyhood of having AS, I was relatevily calm. At least to begin with. I was watching a youtube video of someone matter-of-factly describing growing up with Aspergers and I suddenly found I could not controll my breathing and things went downhill.
I have experienced both and they are both disturbing states to get into. As for the question of whether of not this is Aspergers, I have not come across agrophobic or chlostrophobic symtombs as of yet so could be unrelated but then again, we seem to be still building up a full picture of ASDs so who knows for sure.
Si
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AQ46, EQ9, FQ20, SQ50
RAADS-R: 181 (Language: 9, Social: 97, Sensory/Motor: 37, Interests: 36)
Aspie Quiz: AS129, NT80
Alexithymia: 137