Sharing Our Innermost Thoughts

I was feeling good till I got a bad news about test . So the thing that happened is tomorrow is my viva test on a subject in which I m very poor. I am very tensed coz if I fail then I will be in worst situation. I don’t have the confidence to speak up to new people too . And one thing is effecting me is - If I learn that particular subject , then also when I will be giving viva ; out of tension I will forget everything . I don’t know what to do .