So I had similar experience and was in a nurse residency program. It is hard to be a nurse let alone a new nurse. And for me it hasn't gotten any easier (5 years now). But with that said you learn to have your own way of managing time and tasks. Some days are harder then others. What is your other alternative? If your young enough then do something else...nursing has its many many drawbacks and really isn't that fun or great for the most part. The best days are when you truly made a difference in someones life, worst days are when you are feeling so overwhelmed and just no end in site and just wish to be done with the day.
I personally would say give it a year or 2 and then make a dicision, your not wasting time or effort...it's a job, you get paid, you ARE making a difference in peoples lives. Maybe try working at a clinic, prison nurse, school nurse....there are lots of other options. Just don't give up.