Wow, I am so sorry you are having such a hard time! Some of what you're feeling is normal...the "new nurse" anxiety. Unfortunately, I think things have escalated to a point, in your mind
where you are almost numb with fear and anxiety! That is not good. Like Tweety said, you need to get control of those feelings, gain your confidence, realize that you do have the potential to be a good nurse. A huge part of this is how you think and perceive things. You may need some short term counseling and if your anxiety is bad enough, maybe a short term course of anti-anxiety/depression meds to help you through this.Take care of you, talk to your doc. Nursing is here, and will be. If you start a new unit feeling like this, I'm afraid you'll be setting yourself up for more anxiety....possibly.
After I had my feelings/thoughts, etc under control, what I would do is look to one of those new grad internship programs. A lot of hospitals have them...the are very training intense, and you spend say 3 mos on a unit, learning and working, then rotate to like units. This way, you are learning to be a good nurse, and getting exposure to new areas, all the while in a "new grad" program. That's one option. Most nurse recruiters/HR has the details.
Either way, good luck to you.