Help seriously overwhelmed with new job

I recently started working at Nutraco since September and I feel overwhelmed on a daily basis. I work at a very large facility and when I applied I was told that there would be three dietitians but when I got there there was only one. She was working alone and fell behind in quarterlies and annuals. I write notes very slow even after all this time. I can’t figure out how to speed up using the format they provide. It takes me an hour to write one note. They are expecting 8 notes a day and that’s impossible for me. There are so many things to do per day I cannot fit it all in 8 hours. I stay 1-2 hours late with no compensation because I am salaried and they encourage this because “the work needs to get done”. I don’t even take my 30 minute lunch either just to get work done. I eat as I work. The job has my mental health deteriorating and sometimes I have panic attacks from the amount of work in front of me. It’s too much. I want to quit but I don’t think I can find something better because im a new RD. I just want to go to work and feel like I can manage everything. Is that too much to ask?!