New Job Blues

I started my first job two weeks ago at a local coffee shop. I thought it would be an exciting change from school, but instead, every shift feels like forever. The manager keeps giving me odd looks and I've caught myself making more than just usual rookie mistakes. Yesterday, I accidentally burned the morning's entire supply of decaf lattes! Is this normal for a new job? Am I doomed to be seen as 'that' new employee who messes up all the time? Anyone else ever feel like they can't catch a break at their first real job?