my heart won't stop racing, and NOT in a good way

Today I learned that waiting for someone to call me back for a phone interview is the most frightening thing that has happened to me in a while, and I'm still not sure how to stop myself from going into a panic from being so nervous.  And all she's doing is calling to see what "opportunities I might want to apply for in the future" with consumers energy.  Ahhhhhhhhhhhhh I wish I knew how to relax.  That glass of wine did not even help.