Good grief, Charlie Brown. If I knew where you were working (no, I'm not asking!), I'd make a mental note to not have any of my loved ones admitted to that hospital, or if they were, I'd get them moved ASAFP. What are they thinking? :angryfire
Congratulations on getting licensed and making it through orientation. Now it's time to be good to yourself, KNOW that you are an awesome nurse, and you are totally right to question their staffing.
I'm a new LPN myself, so I know what it feels like to feel bullied into doing what even the most seasoned nurses will refuse; but even this early in my career, I almost had to learn the hard way what it means to my career and license to bite off more than I can chew because of feelings that it's "normal" or "OK" to be thrown that much work as a new grad. It's so easy to feel hesitant about speaking up for fear that you'll be seen as "wimpy", etc. but patient safety has to be the bottom line. If your facility is willing to put productivity before patient care, I agree with the other posts that it's time to move on. Changing jobs is a much more appealing option than taking too much on and losing a patient and then carrying that guilt around the rest of your life.
Stick to your guns. Stand up for yourself, your license, and your patients, and most importantly get some much-deserved rest!