Big Problem

I am a PCC student and a TY.Bcom(Regular).I have been out of town for audit work for past 1.5 months during which time I was required to submit project report and a viva voce for Export  and Income Tax which I have failed to do.I am really tensed now and dont know wat to do??as min.7 mks are required out of 20 in each of the above.Pls.help me how do I approach this situation and how to confront and explain the professors regd. the situation???????????????????