Waiting...

So... I applied for this job, some time back in November and ever since it's tormenting my soul beyond imaginable. I had never before had a panic attack and neither did I think I would have any. Now I have sudden attacks every now and then, all over the day. Who would have guessed, huh? I constantly feel nervious and keep recalling in my mind moments of the interviews (there were 2 interviews): what I did well, and gave them a reason to hire me, and what I did wrong, absolutely ruining my chances to get it. This is so unbearable, for God's sake, why cant I just switch off my brain?