Should I quit this job?

I started a new job 7 weeks ago with no experience. The company knew this when they hired me and I was told I would be trained for at least 5 months. Now all of a sudden a new office is being opened and I am being left at the current office alone with just a secretary. I am on my own as the only medical tech and am not comfortable. I'm getting better at doing certain scans by myself but I'm new at doing injections for contrast and now I'm pressured to get every vein and hope that nothing happens to the patient. There won't be any other doctors, nurses or techs in the office. I am EXTREMELY uncomfortable with this situation and want to leave the job. However the job market is awful. My options are to stay and hope nothing bad happens or quit and work per diem at my old job ( a day here and there, covering for people's vacations) and look for another full time job. What should I do?