Postponement

For the first time in my university experience i had a professor who actually changed the due date of the essay. He actually delayed it by 3 weeks because it was due before break. But now its the week we come back after the 2 week break. Of course this is had to happen the semester that i actually finished my essays so it shouldn't affect me. But now I'm doubting my essay. I was 90% happy with it which is my normal happeniness with essays. But I'm thinking that now since i have 4 weeks to work on it that i might be able to improve it to 100%. So i reserved about 3 books from the British library which i wanted to get before but i thought it would arrive too late.