I don't feel like I can do this any more to be honest. The job feels out of my skill level, I spend the whole shift trying to catch up and feeling confused. This is my second job so I only do 2 shifts a week there but every night before those shifts I'm paralyzed with fear, I want to cry and I can't stop thinking of ways I can quit this and no one will find out and I can just pretend it never happened... 

That's not possible obviously. And I'm stuck. I will be freaking out until the shift starts tomorrow (doubt I will sleep because of the anxiety) and then will freak out the whole shift and I'll come home feeling broken and defeated. 

Please help. I need advice. :(