Another Examination

It's the 3rd day of holiday, and feel a lil bit bore. Playing piano is my daily activities now. Due to piano exam in August. I'll going to have it in 2 or 3 months but guess what, I can't sing or even memorize three to four bars of a piece. How shit I am. I know that this is awkward, I'll be having piano exam but I've to sing and memorize. That's how piano lessons work. We've to know exactly the note we hear and it's hard for me.
Yet, i don't know what i should do. i think it's depend on ME. But how???? i've been thinking hard for it.