Are you stupid if you missed a whole page on a test?

My teacher told me that a kid in the last cl missed the back page and yet I still missed it. Mostly because I didnt get one question and I kept looking back at my microscope to see if I was right. Most of the students expected me to do way better than them, but now I have no chance of that considering I missed 3 questions out 29. I feel horrible, I was having a bad day all day and now I feel like I'm about to cry. Does that stupid mistake mean that I'm either amazingly forgetful or stupid?