Frustration

I'm laying down on my bed, making my best attempt to relax. I'm in the middle of a HUGE ANXIETY ATTACK!!!
My body is numb, but my heart is racing and it feels like my body is trying to turn itself inside out.
I don't know what to do. I took my meds like I was supposed to, and it seems as if the exact reason that I take Celexa is happening at this very moment. I'M RACEY ALLLLL AROUND!!! MY HEART RATE IS EVEN UP MORE THAN IT SHOULD BE!
WHAT NOW!