2. The Fear Of Plagiarism
Did you think of that theory by yourself or did you read it somewhere and then forget about it? Have you definitely referenced everything correctly and accurately and haven't taken the credit for someone else's idea? Did you put it through Turnitin and have you got less than 5%? If not, then panic. Usually, these thoughts will haunt you as you've just handed in your work and there is no chance of getting it back. Now the wait begins.