Work Rollercoaster

So yesterday, at the end of the day, one of my coworkers gave me a public dressing down about creating work items in our system. Normally, this kind of thing really wouldn't bother me, but it really got to me this time, and has every time it has happened at this company. The reason for this is because I was doing exactly what I was told to do by my boss. When I tried to defend myself, she told me that my boss is wrong and not to do it anymore.

I've had a good number of jobs so far in my life. I worked at my parish office, as a lifeguard, for a few temp companies, at the dorm front desk, for a defense software company, at GameStop and now at this health IT company. This is the only place I've felt like I don't know what is expected of me, if I'm doing my job correctly.

I feel trapped in a dead end job. It's like an abusive relationship - I want to leave but I need it to pay the bills. I've been working here for two years and it's almost like I've done so many different things that I'm not good at anything.

At this point I'm really just lost. I've lost so much professional confidence that I don't know what to do.

Can anyone help me?