Stress with my job

I really need a new place of employment because I everytime its time to go to work I start to feel sick. My supervisor get on my last nerves she sit around and looks for the flaws and weakness in eveything a person. I wish I could be working in the field that I have my degree. Ive been trying to complete that task since before I graduated. I have been on several interview, they all say the interview went great but they need someone with experience. I really confused by that statement because how do get you experience if nobody will give me chance and hire me.