I got a job interview , it’s the job I’ve always hoped for , I didn’t think I’d get a chance to be interviewed so I can say I wasn’t anticipating the news . I was happy ofcourse But in a matter of minutes , I had shortness of breath, not as much as panting but obvious discomfort in my chest and this falling feeling in my belly . This is the first time I’ve experienced a completely physical symptom for anxiety. It took me almost an hour to completely calm down . I was just not feeling like myself physically and mentally . 
Is this what a mild panic attack feels like ? What can I do to calm down if this happens again?