Has the actual deadline happened? like, has it been sent off? If not, you're best bet is to maybe own up to your teacher, and ask if you could do it again. I know they're not supposed to let you do it after the deadline or whatever but some teachers can be quite nice, I did pretty much all of my photography exam and sketchbook a few days after the exam had happened, and it was fine. But then I had probably the nicest, most understanding teacher in existence for that subject.