fear of interview

"Oh! my god" was the last thing in my mind when i was called for the interview, today. before that i could hear clearly my hearting thumping and pumping my blood very hard. my mouth was dry, lucky, i had took water...I know what i ve to do or how i should feel before being interviewed, being calm, being confident, etc...heard abt them a lot but its really hard to do such thing in practical moment...i hope my interview was well as i couldn't answer a lot of question which i have studied a long time ago....keeping my fingers crossed......