Am I right to feel this way?

I am new to the medical field and recently got a job in the medical field. I've been working there for a week and a half as a health unit coordinator in a very busy department.

After the 1st day, my trainer said she was going to let me on my own so I can feel the pressure. I've been working there for about a week and a half, and she is giving me a hard time saying I should already know everything.

The thing is, I was never really trained. Most of the time, she is just talking with other employees or doing something else. She doesn't like helping me out because she says I should know everything.

In my opinion, she was a really bad trainer to begin with. To top it off, I have a really hard time reading the doctor's orders which is basically chicken scratch is hardly legible. I have to do patient charts, answer the constantly ringing phone, write patient time up on the board, order lab tests, write patients information in a book, communicate with doctors and other nurses, and we dont have pagers so i have to constantly look for the nurses being asked for by other departments, and my trainer isnt really there when i have questions - and she seems like she hates helping me out. All this at the same time, literally.

Am i right to feel like it's not my fault?