I think you would do just fine.
Probably do even better than ...fine.
The fact is many ED's now use new grads. And YOU have some incredible experience that will be a definite BONUS.
I see that you are in VA - Do you work at Mary Wash?
If so, I can understand your reluctance - it is such a BIG department, with a high census. It can be a little intimidating.
DON'T BE DISCOURAGED. YOU ARE THE REAL DEAL. GO FOR IT!!!
With your experience, I'd take a job in the ED there in a second. I had the opportunity to tour the facility some time ago and I was impressed with the organization! I think they have a good orientation program and (from my perspective - strong clinicians) seem to be very progressive and proactive in patient management ... so --- I think this would be a great place to LEARN and GROW.
Take all the alphabet soup classes you can (ACLS, PALS, TNCC, ENPC, NRP) - job shadow a shift or two. Get excited about learning new things! I find that the NEW can keep me going when I'm ready to give up!
If I can help, PM me anytime.