So confused right now

• I have a test at 7pm
• I study up until then, sending a text message to my flatmate about 15 minutes before test starts saying "i'm screwed"
  
• I arrive. I'm a minute early. But everyone has already started on their tests.
  
• 8.15pm, the 15 minute warning before the end of the test arrives much sooner than expected. End result: I finish 29 marks worth of the questions out of 50.
  
• I come home and something doesn't feel right. All that I do though is go to the video store to return The Triplets of Belleville.
  
• I suddenly come to a realisation of what's going on. I get back home and knock very loudly on my flatmate's door to check when I sent that text.
  
• As I expected: 7.15pm
• So I somehow lost the ability to read clocks and mistook 7pm for 7.30pm. I'm very annoyed with myself. And very confused.
• I'm also probably fucked. I needed 40% to get terms and I doubt I achieved that. I think I answered the questions fairly well but 20 out of 29? God I hope I did.