I could have written your post and in addition I'm seriously thinking about leaving nursing, I am a new grad RN with 9 months of experience in LTC, nobody told me in school how stessfull nursing is. One night I was so anxious that I couldn't sleep at all, I spent the whole night thinking about the shift. At 5:30 am I got up and worked 12 hours, I don't know how I did that. My coworkers say I am a very good nurse. I don't know what happens, I can't control my anxiety.
Good luck to you, hope things will get better!