Thank god thats over!

I've just finished a 1 hour 45 minute economics exam. I think I killed my brain. That was such an exhausting exam. I also have a horrible feeling I substituted excise duty with exercise duty throughout the exam. Noticed I made that mistake at the end of the exam. Didn't have time to go back and check the rest of my answers. Also I think that was the first exam I have ever done where I required extra paper. Brain too exhausted to write anymore ( my brain can't handle more than a few short sentences). Must start revising for 2 biology A levels tomorrow. Bye.